256474631 has 16 divisors (see below), whose sum is σ = 313118784. Its totient is φ = 205062144.

The previous prime is 256474619. The next prime is 256474657. The reversal of 256474631 is 136474652.

It is a happy number.

It is not a de Polignac number, because 256474631 - 2⁶ = 256474567 is a prime.

It is a super-2 number, since 2×256474631² = 131558472693172322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256474681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3911 + ... + 22983.

It is an arithmetic number, because the mean of its divisors is an integer number (19569924).

Almost surely, 2^256474631 is an apocalyptic number.

256474631 is a deficient number, since it is larger than the sum of its proper divisors (56644153).

256474631 is a wasteful number, since it uses less digits than its factorization.

256474631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19210.

The product of its digits is 120960, while the sum is 38.

The square root of 256474631 is about 16014.8253502809. The cubic root of 256474631 is about 635.3525898504.

The spelling of 256474631 in words is "two hundred fifty-six million, four hundred seventy-four thousand, six hundred thirty-one".