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+#!/usr/bin/env python3
+
+# Challenge 153
+#
+# TASK #2 > Factorions
+# Submitted by: Mohammad S Anwar
+# You are given an integer, $n.
+#
+# Write a script to figure out if the given integer is factorion.
+#
+# A factorion is a natural number that equals the sum of the factorials
+# of its digits.
+#
+# Example 1:
+# Input: $n = 145
+# Output: 1
+#
+#     Since 1! + 4! + 5! => 1 + 24 + 120 = 145
+# Example 2:
+# Input: $n = 123
+# Output: 0
+#
+#     Since 1! + 2! + 3! => 1 + 2 + 6 <> 123
+
+import sys
+
+def fact(n):
+    if n < 2:
+        return 1
+    else:
+        return n * fact(n-1)
+
+def is_factorian(n):
+    fact_sum = [fact(int(x)) for x in str(n)]
+    if sum(fact_sum) == n:
+        return True
+    else:
+        return False
+
+n = int(sys.argv[1])
+print(1 if is_factorian(n) else 0)