256627231 has 8 divisors (see below), whose sum is σ = 293385344. Its totient is φ = 219893400.

The previous prime is 256627213. The next prime is 256627237. The reversal of 256627231 is 132726652.

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 256627231 - 2⁹ = 256626719 is a prime.

It is a super-2 number, since 2×256627231² = 131715071381454722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256627237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36556 + ... + 43006.

It is an arithmetic number, because the mean of its divisors is an integer number (36673168).

Almost surely, 2^256627231 is an apocalyptic number.

256627231 is a deficient number, since it is larger than the sum of its proper divisors (36758113).

256627231 is an equidigital number, since it uses as much as digits as its factorization.

256627231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12141.

The product of its digits is 30240, while the sum is 34.

The square root of 256627231 is about 16019.5889772491. The cubic root of 256627231 is about 635.4785744779.

The spelling of 256627231 in words is "two hundred fifty-six million, six hundred twenty-seven thousand, two hundred thirty-one".