231565072 has 40 divisors (see below), whose sum is σ = 455607000. Its totient is φ = 114004992.

The previous prime is 231565063. The next prime is 231565073. The reversal of 231565072 is 270565132.

231565072 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 38416 + 231526656 = 196^2 + 15216^2 .

It is not an unprimeable number, because it can be changed into a prime (231565073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 326254 + ... + 326962.

It is an arithmetic number, because the mean of its divisors is an integer number (11390175).

Almost surely, 2^231565072 is an apocalyptic number.

It is an amenable number.

231565072 is a deficient number, since it is larger than the sum of its proper divisors (224041928).

231565072 is a wasteful number, since it uses less digits than its factorization.

231565072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1003 (or 997 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 231565072 is about 15217.2623030557. The cubic root of 231565072 is about 614.0791489036.

The spelling of 231565072 in words is "two hundred thirty-one million, five hundred sixty-five thousand, seventy-two".