231967812 has 12 divisors (see below), whose sum is σ = 541258256. Its totient is φ = 77322600.

The previous prime is 231967777. The next prime is 231967829. The reversal of 231967812 is 218769132.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9665314 + ... + 9665337.

Almost surely, 2^231967812 is an apocalyptic number.

It is an amenable number.

231967812 is an abundant number, since it is smaller than the sum of its proper divisors (309290444).

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

231967812 is a wasteful number, since it uses less digits than its factorization.

231967812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19330658 (or 19330656 counting only the distinct ones).

The product of its digits is 36288, while the sum is 39.

The square root of 231967812 is about 15230.4895522107. The cubic root of 231967812 is about 614.4349466579.

The spelling of 231967812 in words is "two hundred thirty-one million, nine hundred sixty-seven thousand, eight hundred twelve".