231611068513256 has 16 divisors (see below), whose sum is σ = 434732252683140. Its totient is φ = 115682467797760.

The previous prime is 231611068513229. The next prime is 231611068513283. The reversal of 231611068513256 is 652315860116132.

It is an interprime number because it is at equal distance from previous prime (231611068513229) and next prime (231611068513283).

It can be written as a sum of positive squares in 2 ways, for example, as 219865135622500 + 11745932890756 = 14827850^2 + 3427234^2 .

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, 15383299361 + ... + 15383314416.

Almost surely, 2^{231611068513256} is an apocalyptic number.

It is an amenable number.

231611068513256 is a deficient number, since it is larger than the sum of its proper divisors (203121184169884).

231611068513256 is a wasteful number, since it uses less digits than its factorization.

231611068513256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30766614724 (or 30766614720 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 50.

The spelling of 231611068513256 in words is "two hundred thirty-one trillion, six hundred eleven billion, sixty-eight million, five hundred thirteen thousand, two hundred fifty-six".