656043231 has 8 divisors (see below), whose sum is σ = 875059200. Its totient is φ = 437194712.

The previous prime is 656043203. The next prime is 656043233. The reversal of 656043231 is 132340656.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 656043231 - 2⁷ = 656043103 is a prime.

It is a super-2 number, since 2×656043231² = 860785441881838722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656043233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32415 + ... + 48608.

It is an arithmetic number, because the mean of its divisors is an integer number (109382400).

Almost surely, 2^656043231 is an apocalyptic number.

656043231 is a deficient number, since it is larger than the sum of its proper divisors (219015969).

656043231 is a wasteful number, since it uses less digits than its factorization.

656043231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83725.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 656043231 is about 25613.3408793152. The cubic root of 656043231 is about 868.9153837547.

Adding to 656043231 its reverse (132340656), we get a palindrome (788383887).

The spelling of 656043231 in words is "six hundred fifty-six million, forty-three thousand, two hundred thirty-one".