331321012320 has 48 divisors (see below), whose sum is σ = 1043661190320. Its totient is φ = 88352269824.

The previous prime is 331321012307. The next prime is 331321012331. The reversal of 331321012320 is 23210123133.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×331321012320² (a number of 24 digits) 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 7 ways as a sum of consecutive naturals, for example, 345125575 + ... + 345126534.

It is an arithmetic number, because the mean of its divisors is an integer number (21742941465).

Almost surely, 2^331321012320 is an apocalyptic number.

331321012320 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

331321012320 is an abundant number, since it is smaller than the sum of its proper divisors (712340178000).

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

331321012320 is a wasteful number, since it uses less digits than its factorization.

331321012320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690252127 (or 690252119 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 331321012320 its reverse (23210123133), we get a palindrome (354531135453).

The spelling of 331321012320 in words is "three hundred thirty-one billion, three hundred twenty-one million, twelve thousand, three hundred twenty".