256231504 has 20 divisors (see below), whose sum is σ = 497021760. Its totient is φ = 127967840.

The previous prime is 256231499. The next prime is 256231529. The reversal of 256231504 is 405132652.

It is a super-3 number, since 3×256231504³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5787 + ... + 23365.

It is an arithmetic number, because the mean of its divisors is an integer number (24851088).

Almost surely, 2^256231504 is an apocalyptic number.

It is an amenable number.

256231504 is a deficient number, since it is larger than the sum of its proper divisors (240790256).

256231504 is a wasteful number, since it uses less digits than its factorization.

256231504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18498 (or 18492 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 256231504 is about 16007.2328651769. The cubic root of 256231504 is about 635.1517640027.

The spelling of 256231504 in words is "two hundred fifty-six million, two hundred thirty-one thousand, five hundred four".