13231571256 has 48 divisors (see below), whose sum is σ = 36190332360. Its totient is φ = 4366852800.

The previous prime is 13231571231. The next prime is 13231571293. The reversal of 13231571256 is 65217513231.

13231571256 is a `hidden beast` number, since 1 + 3 + 2 + 31 + 571 + 2 + 56 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 13231571256.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 902490 + ... + 917033.

Almost surely, 2^13231571256 is an apocalyptic number.

It is an amenable number.

13231571256 is an abundant number, since it is smaller than the sum of its proper divisors (22958761104).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13231571256 is a wasteful number, since it uses less digits than its factorization.

13231571256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1819636 (or 1819629 counting only the distinct ones).

The product of its digits is 37800, while the sum is 36.

The spelling of 13231571256 in words is "thirteen billion, two hundred thirty-one million, five hundred seventy-one thousand, two hundred fifty-six".