231911012 has 6 divisors (see below), whose sum is σ = 405844278. Its totient is φ = 115955504.

The previous prime is 231910993. The next prime is 231911023. The reversal of 231911012 is 210119132.

231911012 is digitally balanced in base 3, 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 only one way, i.e., 223981156 + 7929856 = 14966^2 + 2816^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28988873 + ... + 28988880.

It is an arithmetic number, because the mean of its divisors is an integer number (67640713).

Almost surely, 2^231911012 is an apocalyptic number.

It is an amenable number.

231911012 is a deficient number, since it is larger than the sum of its proper divisors (173933266).

231911012 is a wasteful number, since it uses less digits than its factorization.

231911012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57977757 (or 57977755 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 231911012 is about 15228.6247573443. The cubic root of 231911012 is about 614.3847920645.

It can be divided in two parts, 2319 and 11012, that added together give a palindrome (13331).

The spelling of 231911012 in words is "two hundred thirty-one million, nine hundred eleven thousand, twelve".