231213104 has 20 divisors (see below), whose sum is σ = 458902920. Its totient is φ = 112786560.

The previous prime is 231213077. The next prime is 231213113. The reversal of 231213104 is 401312132.

231213104 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×231213104² = 106918998922629632, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175574 + ... + 176885.

It is an arithmetic number, because the mean of its divisors is an integer number (22945146).

Almost surely, 2^231213104 is an apocalyptic number.

It is an amenable number.

231213104 is a deficient number, since it is larger than the sum of its proper divisors (227689816).

231213104 is a wasteful number, since it uses less digits than its factorization.

231213104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352508 (or 352502 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 231213104 is about 15205.6931443456. The cubic root of 231213104 is about 613.7678673472.

Adding to 231213104 its reverse (401312132), we get a palindrome (632525236).

The spelling of 231213104 in words is "two hundred thirty-one million, two hundred thirteen thousand, one hundred four".