256526031 has 4 divisors (see below), whose sum is σ = 342034712. Its totient is φ = 171017352.

The previous prime is 256525991. The next prime is 256526033. The reversal of 256526031 is 130625652.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-256526031 is a prime.

It is a super-2 number, since 2×256526031² = 131611209161225922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 256526031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256526033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42754336 + ... + 42754341.

It is an arithmetic number, because the mean of its divisors is an integer number (85508678).

Almost surely, 2^256526031 is an apocalyptic number.

256526031 is a deficient number, since it is larger than the sum of its proper divisors (85508681).

256526031 is an equidigital number, since it uses as much as digits as its factorization.

256526031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85508680.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 256526031 is about 16016.4300329381. The cubic root of 256526031 is about 635.3950306195.

The spelling of 256526031 in words is "two hundred fifty-six million, five hundred twenty-six thousand, thirty-one".