256012547231 has 16 divisors (see below), whose sum is σ = 299180666880. Its totient is φ = 214504704960.

The previous prime is 256012547173. The next prime is 256012547249. The reversal of 256012547231 is 132745210652.

It is a de Polignac number, because none of the positive numbers 2^k-256012547231 is a prime.

It is a super-2 number, since 2×256012547231² (a number of 24 digits) 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 (256012547261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 214775 + ... + 747096.

It is an arithmetic number, because the mean of its divisors is an integer number (18698791680).

Almost surely, 2^256012547231 is an apocalyptic number.

256012547231 is a deficient number, since it is larger than the sum of its proper divisors (43168119649).

256012547231 is an equidigital number, since it uses as much as digits as its factorization.

256012547231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 962734.

The product of its (nonzero) digits is 100800, while the sum is 38.

Adding to 256012547231 its reverse (132745210652), we get a palindrome (388757757883).

The spelling of 256012547231 in words is "two hundred fifty-six billion, twelve million, five hundred forty-seven thousand, two hundred thirty-one".