231693992 has 16 divisors (see below), whose sum is σ = 449406900. Its totient is φ = 111852160.

The previous prime is 231693983. The next prime is 231694007. The reversal of 231693992 is 299396132.

It can be written as a sum of positive squares in 2 ways, for example, as 227828836 + 3865156 = 15094^2 + 1966^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 499109 + ... + 499572.

Almost surely, 2^231693992 is an apocalyptic number.

It is an amenable number.

231693992 is a deficient number, since it is larger than the sum of its proper divisors (217712908).

231693992 is a wasteful number, since it uses less digits than its factorization.

231693992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 998716 (or 998712 counting only the distinct ones).

The product of its digits is 157464, while the sum is 44.

The square root of 231693992 is about 15221.4976924086. The cubic root of 231693992 is about 614.1930872106.

The spelling of 231693992 in words is "two hundred thirty-one million, six hundred ninety-three thousand, nine hundred ninety-two".