231220408 has 16 divisors (see below), whose sum is σ = 433762560. Its totient is φ = 115550400.

The previous prime is 231220387. The next prime is 231220421. The reversal of 231220408 is 804022132.

231220408 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 11913 + ... + 24583.

It is an arithmetic number, because the mean of its divisors is an integer number (27110160).

Almost surely, 2^231220408 is an apocalyptic number.

It is an amenable number.

231220408 is a deficient number, since it is larger than the sum of its proper divisors (202542152).

231220408 is a wasteful number, since it uses less digits than its factorization.

231220408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14958 (or 14954 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 231220408 is about 15205.9333156502. The cubic root of 231220408 is about 613.7743302354.

The spelling of 231220408 in words is "two hundred thirty-one million, two hundred twenty thousand, four hundred eight".