231857825916 has 48 divisors (see below), whose sum is σ = 542979859968. Its totient is φ = 77003553600.

The previous prime is 231857825869. The next prime is 231857825921. The reversal of 231857825916 is 619528758132.

It is a super-2 number, since 2×231857825916² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9328786 + ... + 9353606.

It is an arithmetic number, because the mean of its divisors is an integer number (11312080416).

Almost surely, 2^231857825916 is an apocalyptic number.

It is an amenable number.

231857825916 is an abundant number, since it is smaller than the sum of its proper divisors (311122034052).

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

231857825916 is a wasteful number, since it uses less digits than its factorization.

231857825916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27642 (or 27640 counting only the distinct ones).

The product of its digits is 7257600, while the sum is 57.

The spelling of 231857825916 in words is "two hundred thirty-one billion, eight hundred fifty-seven million, eight hundred twenty-five thousand, nine hundred sixteen".