312431320 has 16 divisors (see below), whose sum is σ = 702970560. Its totient is φ = 124972512.

The previous prime is 312431291. The next prime is 312431359. The reversal of 312431320 is 23134213.

312431320 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 2×312431320² = 195226659433884800, which contains 22 as substring.

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, 3905352 + ... + 3905431.

It is an arithmetic number, because the mean of its divisors is an integer number (43935660).

Almost surely, 2^312431320 is an apocalyptic number.

It is an amenable number.

312431320 is an abundant number, since it is smaller than the sum of its proper divisors (390539240).

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

312431320 is a wasteful number, since it uses less digits than its factorization.

312431320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7810794 (or 7810790 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 312431320 is about 17675.7268591705. The cubic root of 312431320 is about 678.5546868525.

Adding to 312431320 its reverse (23134213), we get a palindrome (335565533).

The spelling of 312431320 in words is "three hundred twelve million, four hundred thirty-one thousand, three hundred twenty".