231373812 has 12 divisors (see below), whose sum is σ = 539872256. Its totient is φ = 77124600.

The previous prime is 231373799. The next prime is 231373817. The reversal of 231373812 is 218373132.

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

It is a super-2 number, since 2×231373812² = 107067681758822688, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 231373812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231373817) 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, 9640564 + ... + 9640587.

Almost surely, 2^231373812 is an apocalyptic number.

It is an amenable number.

231373812 is an abundant number, since it is smaller than the sum of its proper divisors (308498444).

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

231373812 is a wasteful number, since it uses less digits than its factorization.

231373812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19281158 (or 19281156 counting only the distinct ones).

The product of its digits is 6048, while the sum is 30.

The square root of 231373812 is about 15210.9766944795. The cubic root of 231373812 is about 613.9100371470.

The spelling of 231373812 in words is "two hundred thirty-one million, three hundred seventy-three thousand, eight hundred twelve".