231564212 has 12 divisors (see below), whose sum is σ = 442077216. Its totient is φ = 105256440.

The previous prime is 231564211. The next prime is 231564227. The reversal of 231564212 is 212465132.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231564211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2631368 + ... + 2631455.

It is an arithmetic number, because the mean of its divisors is an integer number (36839768).

Almost surely, 2^231564212 is an apocalyptic number.

231564212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

231564212 is a deficient number, since it is larger than the sum of its proper divisors (210513004).

231564212 is a wasteful number, since it uses less digits than its factorization.

231564212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5262838 (or 5262836 counting only the distinct ones).

The product of its digits is 2880, while the sum is 26.

The square root of 231564212 is about 15217.2340456471. The cubic root of 231564212 is about 614.0783887016.

The spelling of 231564212 in words is "two hundred thirty-one million, five hundred sixty-four thousand, two hundred twelve".