231331012 has 24 divisors (see below), whose sum is σ = 442471680. Its totient is φ = 104950560.

The previous prime is 231331007. The next prime is 231331049. The reversal of 231331012 is 210133132.

231331012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×231331012² = 107028074225888288, which contains 22 as substring.

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, 19789 + ... + 29227.

It is an arithmetic number, because the mean of its divisors is an integer number (18436320).

Almost surely, 2^231331012 is an apocalyptic number.

231331012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

231331012 is a deficient number, since it is larger than the sum of its proper divisors (211140668).

231331012 is a wasteful number, since it uses less digits than its factorization.

231331012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10011 (or 10009 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 231331012 is about 15209.5697506537. The cubic root of 231331012 is about 613.8721807021.

Adding to 231331012 its reverse (210133132), we get a palindrome (441464144).

The spelling of 231331012 in words is "two hundred thirty-one million, three hundred thirty-one thousand, twelve".