256375031 has 16 divisors (see below), whose sum is σ = 284823168. Its totient is φ = 228808800.

The previous prime is 256375019. The next prime is 256375069. The reversal of 256375031 is 130573652.

It is not a de Polignac number, because 256375031 - 2⁶ = 256374967 is a prime.

It is a super-2 number, since 2×256375031² = 131456313040501922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256372031) 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, 398396 + ... + 399038.

It is an arithmetic number, because the mean of its divisors is an integer number (17801448).

Almost surely, 2^256375031 is an apocalyptic number.

256375031 is a deficient number, since it is larger than the sum of its proper divisors (28448137).

256375031 is a wasteful number, since it uses less digits than its factorization.

256375031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1262.

The product of its (nonzero) digits is 18900, while the sum is 32.

The square root of 256375031 is about 16011.7154296471. The cubic root of 256375031 is about 635.2703343969.

The spelling of 256375031 in words is "two hundred fifty-six million, three hundred seventy-five thousand, thirty-one".