diff --git a/core/src/main/kotlin/org/nwapw/abacus/number/NumberInterface.kt b/core/src/main/kotlin/org/nwapw/abacus/number/NumberInterface.kt
index 3279af6..9b14ae9 100644
--- a/core/src/main/kotlin/org/nwapw/abacus/number/NumberInterface.kt
+++ b/core/src/main/kotlin/org/nwapw/abacus/number/NumberInterface.kt
@@ -221,6 +221,13 @@ abstract class NumberInterface: Comparable<NumberInterface> {
         return fractionalPartInternal()
     }
 
+    /**
+     * Checks whether the given number is an integer or not.
+     *
+     * @return whether the number is an integer or not.
+     */
+    fun isInteger() = fractionalPart().signum() == 0
+
     /**
      * Returns a NumberRangeBuilder object, which is used to create a range.
      * The reason that this returns a builder and not an actual range is that
diff --git a/core/src/main/kotlin/org/nwapw/abacus/plugin/standard/operator/OperatorCaret.kt b/core/src/main/kotlin/org/nwapw/abacus/plugin/standard/operator/OperatorCaret.kt
index c587ec9..75022a0 100644
--- a/core/src/main/kotlin/org/nwapw/abacus/plugin/standard/operator/OperatorCaret.kt
+++ b/core/src/main/kotlin/org/nwapw/abacus/plugin/standard/operator/OperatorCaret.kt
@@ -17,7 +17,7 @@ class OperatorCaret: NumberOperator(OperatorAssociativity.RIGHT, OperatorType.BI
     override fun matchesParams(context: MutableEvaluationContext, params: Array<out NumberInterface>) =
             params.size == 2
                     && !(params[0].signum() == 0 && params[1].signum() == 0)
-                    && !(params[0].signum() == -1 && params[1].fractionalPart().signum() != 0)
+                    && !(params[0].signum() == -1 && !params[1].isInteger())
 
     override fun applyInternal(context: MutableEvaluationContext, params: Array<out NumberInterface>): NumberInterface {
         val implementation = context.inheritedNumberImplementation
@@ -26,7 +26,7 @@ class OperatorCaret: NumberOperator(OperatorAssociativity.RIGHT, OperatorType.BI
         else if (params[1].signum() == 0)
             return implementation.instanceForString("1")
         //Detect integer bases:
-        if (params[0].fractionalPart().signum() == 0
+        if (params[0].isInteger()
                 && FUNCTION_ABS.apply(context, params[1]) < implementation.instanceForString(Integer.toString(Integer.MAX_VALUE))
                 && FUNCTION_ABS.apply(context, params[1]) >= implementation.instanceForString("1")) {
             val newParams = arrayOf(params[0], params[1].fractionalPart())
diff --git a/core/src/main/kotlin/org/nwapw/abacus/plugin/standard/operator/OperatorFactorial.kt b/core/src/main/kotlin/org/nwapw/abacus/plugin/standard/operator/OperatorFactorial.kt
index e520ecc..cc8e1fd 100644
--- a/core/src/main/kotlin/org/nwapw/abacus/plugin/standard/operator/OperatorFactorial.kt
+++ b/core/src/main/kotlin/org/nwapw/abacus/plugin/standard/operator/OperatorFactorial.kt
@@ -15,7 +15,7 @@ class OperatorFactorial: NumberOperator(OperatorAssociativity.LEFT, OperatorType
 
     override fun matchesParams(context: MutableEvaluationContext, params: Array<out NumberInterface>) =
         params.size == 1
-                && params[0].fractionalPart().signum() == 0
+                && params[0].isInteger()
                 && params[0].signum() >= 0
 
     override fun applyInternal(context: MutableEvaluationContext, params: Array<out NumberInterface>): NumberInterface {
diff --git a/core/src/main/kotlin/org/nwapw/abacus/plugin/standard/operator/OperatorNcr.kt b/core/src/main/kotlin/org/nwapw/abacus/plugin/standard/operator/OperatorNcr.kt
index 22fea5a..67330ab 100644
--- a/core/src/main/kotlin/org/nwapw/abacus/plugin/standard/operator/OperatorNcr.kt
+++ b/core/src/main/kotlin/org/nwapw/abacus/plugin/standard/operator/OperatorNcr.kt
@@ -17,8 +17,8 @@ import org.nwapw.abacus.plugin.standard.StandardPlugin.OP_NPR
 class OperatorNcr: NumberOperator(OperatorAssociativity.RIGHT, OperatorType.BINARY_INFIX, 0) {
 
     override fun matchesParams(context: MutableEvaluationContext, params: Array<out NumberInterface>) =
-            params.size == 2 && params[0].fractionalPart().signum() == 0
-                    && params[1].fractionalPart().signum() == 0
+            params.size == 2 && params[0].isInteger()
+                    && params[1].isInteger()
 
     override fun applyInternal(context: MutableEvaluationContext, params: Array<out NumberInterface>) =
             OP_NPR.apply(context, *params) / OP_FACTORIAL.apply(context, params[1])
diff --git a/core/src/main/kotlin/org/nwapw/abacus/plugin/standard/operator/OperatorNpr.kt b/core/src/main/kotlin/org/nwapw/abacus/plugin/standard/operator/OperatorNpr.kt
index dfc9fd2..dd2aa94 100644
--- a/core/src/main/kotlin/org/nwapw/abacus/plugin/standard/operator/OperatorNpr.kt
+++ b/core/src/main/kotlin/org/nwapw/abacus/plugin/standard/operator/OperatorNpr.kt
@@ -15,8 +15,8 @@ import org.nwapw.abacus.number.NumberInterface
 class OperatorNpr: NumberOperator(OperatorAssociativity.RIGHT, OperatorType.BINARY_INFIX, 0) {
 
     override fun matchesParams(context: MutableEvaluationContext, params: Array<out NumberInterface>) =
-            params.size == 2 && params[0].fractionalPart().signum() == 0
-                    && params[1].fractionalPart().signum() == 0
+            params.size == 2 && params[0].isInteger()
+                    && params[1].isInteger()
 
     override fun applyInternal(context: MutableEvaluationContext, params: Array<out NumberInterface>): NumberInterface {
         val implementation = context.inheritedNumberImplementation