Check if a number is Prime, Perfect, Armstrong, Palindrome, etc.
Analyze Number
Properties
Is Prime?No
Is Perfect?Yes
Is Armstrong?No
Is Palindrome?No
Is Perfect Square?No
About this calculator
Number Properties
Numbers can be classified by various interesting properties. Primes have only two divisors. Perfect numbers equal the sum of their proper divisors. Armstrong numbers equal the sum of their digits raised to the power of the number of digits.
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Pro Tips
2 is the only even prime number.
6 is the smallest perfect number (1 + 2 + 3 = 6).
153 is an Armstrong number (1³ + 5³ + 3³ = 153).
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Fun Facts
"There are infinitely many prime numbers."
"It is unknown if there are any odd perfect numbers."
