231644372 has 12 divisors (see below), whose sum is σ = 407197056. Its totient is φ = 115302360.

The previous prime is 231644359. The next prime is 231644381. The reversal of 231644372 is 273446132.

231644372 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 128954 + ... + 130737.

It is an arithmetic number, because the mean of its divisors is an integer number (33933088).

Almost surely, 2^231644372 is an apocalyptic number.

It is an amenable number.

231644372 is a deficient number, since it is larger than the sum of its proper divisors (175552684).

231644372 is a wasteful number, since it uses less digits than its factorization.

231644372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259918 (or 259916 counting only the distinct ones).

The product of its digits is 24192, while the sum is 32.

The square root of 231644372 is about 15219.8676735378. The cubic root of 231644372 is about 614.1492385166.

The spelling of 231644372 in words is "two hundred thirty-one million, six hundred forty-four thousand, three hundred seventy-two".