231661968 has 20 divisors (see below), whose sum is σ = 598460208. Its totient is φ = 77220640.

The previous prime is 231661949. The next prime is 231661981. The reversal of 231661968 is 869166132.

231661968 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 2413098 + ... + 2413193.

Almost surely, 2^231661968 is an apocalyptic number.

It is an amenable number.

231661968 is an abundant number, since it is smaller than the sum of its proper divisors (366798240).

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

231661968 is a wasteful number, since it uses less digits than its factorization.

231661968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4826302 (or 4826296 counting only the distinct ones).

The product of its digits is 93312, while the sum is 42.

The square root of 231661968 is about 15220.4457227770. The cubic root of 231661968 is about 614.1647886410.

The spelling of 231661968 in words is "two hundred thirty-one million, six hundred sixty-one thousand, nine hundred sixty-eight".