231243972 has 24 divisors (see below), whose sum is σ = 541833600. Its totient is φ = 76757856.

The previous prime is 231243953. The next prime is 231243989. The reversal of 231243972 is 279342132.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37447 + ... + 43182.

It is an arithmetic number, because the mean of its divisors is an integer number (22576400).

Almost surely, 2^231243972 is an apocalyptic number.

It is an amenable number.

231243972 is an abundant number, since it is smaller than the sum of its proper divisors (310589628).

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

231243972 is a wasteful number, since it uses less digits than its factorization.

231243972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80875 (or 80873 counting only the distinct ones).

The product of its digits is 18144, while the sum is 33.

The square root of 231243972 is about 15206.7081250348. The cubic root of 231243972 is about 613.7951797315.

The spelling of 231243972 in words is "two hundred thirty-one million, two hundred forty-three thousand, nine hundred seventy-two".