Adding to 656231 its reverse (132656), we get a palindrome (788887).
It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-656231 is a prime.
It is a d-powerful number, because it can be written as 6 + 57 + 2 + 66 + 312 + 1 .
It is a Duffinian number.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 656231.
2656231 is an apocalyptic number.
656231 is a wasteful number, since it uses less digits than its factorization.
656231 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 6240.
The square root of 656231 is about 810.0808601615. The cubic root of 656231 is about 86.8998274537.
The spelling of 656231 in words is "six hundred fifty-six thousand, two hundred thirty-one".