231915992 has 64 divisors (see below), whose sum is σ = 565747200. Its totient is φ = 86423040.

The previous prime is 231915977. The next prime is 231916031. The reversal of 231915992 is 299519132.

231915992 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

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, 5984 + ... + 22352.

It is an arithmetic number, because the mean of its divisors is an integer number (8839800).

Almost surely, 2^231915992 is an apocalyptic number.

231915992 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231915992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (282873600).

231915992 is an abundant number, since it is smaller than the sum of its proper divisors (333831208).

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

231915992 is a wasteful number, since it uses less digits than its factorization.

231915992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16416 (or 16412 counting only the distinct ones).

The product of its digits is 43740, while the sum is 41.

The square root of 231915992 is about 15228.7882643367. The cubic root of 231915992 is about 614.3891897489.

The spelling of 231915992 in words is "two hundred thirty-one million, nine hundred fifteen thousand, nine hundred ninety-two".