331308970920 has 48 divisors (see below), whose sum is σ = 1076754156660. Its totient is φ = 88349058816.

The previous prime is 331308970903. The next prime is 331308970943. The reversal of 331308970920 is 29079803133.

331308970920 is a `hidden beast` number, since 331 + 308 + 9 + 7 + 0 + 9 + 2 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 325385821476 + 5923149444 = 570426^2 + 76962^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 460150989 + ... + 460151708.

Almost surely, 2^331308970920 is an apocalyptic number.

331308970920 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

331308970920 is an abundant number, since it is smaller than the sum of its proper divisors (745445185740).

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

331308970920 is a wasteful number, since it uses less digits than its factorization.

331308970920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 920302714 (or 920302707 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The spelling of 331308970920 in words is "three hundred thirty-one billion, three hundred eight million, nine hundred seventy thousand, nine hundred twenty".