231512568 has 256 divisors, whose sum is σ = 749952000. Its totient is φ = 58060800.

The previous prime is 231512513. The next prime is 231512573. The reversal of 231512568 is 865215132.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3795258 + ... + 3795318.

It is an arithmetic number, because the mean of its divisors is an integer number (2929500).

Almost surely, 2^231512568 is an apocalyptic number.

231512568 is a gapful number since it is divisible by the number (28) 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 231512568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (374976000).

231512568 is an abundant number, since it is smaller than the sum of its proper divisors (518439432).

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

231512568 is a wasteful number, since it uses less digits than its factorization.

231512568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166 (or 162 counting only the distinct ones).

The product of its digits is 14400, while the sum is 33.

The square root of 231512568 is about 15215.5370592037. The cubic root of 231512568 is about 614.0327342343.

The spelling of 231512568 in words is "two hundred thirty-one million, five hundred twelve thousand, five hundred sixty-eight".