231158899856 has 20 divisors (see below), whose sum is σ = 454005581292. Its totient is φ = 113996169216.

The previous prime is 231158899823. The next prime is 231158899877. The reversal of 231158899856 is 658998851132.

It can be written as a sum of positive squares in 2 ways, for example, as 64711219456 + 166447680400 = 254384^2 + 407980^2 .

It is a junction number, because it is equal to n+sod(n) for n = 231158899792 and 231158899801.

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, 98953841 + ... + 98956176.

Almost surely, 2^231158899856 is an apocalyptic number.

It is an amenable number.

231158899856 is a deficient number, since it is larger than the sum of its proper divisors (222846681436).

231158899856 is a wasteful number, since it uses less digits than its factorization.

231158899856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197910098 (or 197910092 counting only the distinct ones).

The product of its digits is 37324800, while the sum is 65.

The spelling of 231158899856 in words is "two hundred thirty-one billion, one hundred fifty-eight million, eight hundred ninety-nine thousand, eight hundred fifty-six".