231272392 has 16 divisors (see below), whose sum is σ = 466992540. Its totient is φ = 106741056.

The previous prime is 231272359. The next prime is 231272401. The reversal of 231272392 is 293272132.

It can be written as a sum of positive squares in 2 ways, for example, as 210424036 + 20848356 = 14506^2 + 4566^2 .

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, 1111783 + ... + 1111990.

Almost surely, 2^231272392 is an apocalyptic number.

It is an amenable number.

231272392 is an abundant number, since it is smaller than the sum of its proper divisors (235720148).

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

231272392 is a wasteful number, since it uses less digits than its factorization.

231272392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2223792 (or 2223788 counting only the distinct ones).

The product of its digits is 9072, while the sum is 31.

The square root of 231272392 is about 15207.6425523485. The cubic root of 231272392 is about 613.8203239465.

The spelling of 231272392 in words is "two hundred thirty-one million, two hundred seventy-two thousand, three hundred ninety-two".