231513870 has 32 divisors (see below), whose sum is σ = 635010048. Its totient is φ = 52917408.

The previous prime is 231513853. The next prime is 231513899. The reversal of 231513870 is 78315132.

231513870 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 551014 + ... + 551433.

It is an arithmetic number, because the mean of its divisors is an integer number (19844064).

Almost surely, 2^231513870 is an apocalyptic number.

231513870 is an abundant number, since it is smaller than the sum of its proper divisors (403496178).

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

231513870 is a wasteful number, since it uses less digits than its factorization.

231513870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1102464.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 231513870 is about 15215.5798443569. The cubic root of 231513870 is about 614.0338853153.

The spelling of 231513870 in words is "two hundred thirty-one million, five hundred thirteen thousand, eight hundred seventy".