331131320 has 64 divisors (see below), whose sum is σ = 808647840. Its totient is φ = 121305600.

The previous prime is 331131289. The next prime is 331131337. The reversal of 331131320 is 23131133.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65690 + ... + 70550.

Almost surely, 2^331131320 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 331131320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (404323920).

331131320 is an abundant number, since it is smaller than the sum of its proper divisors (477516520).

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

331131320 is a wasteful number, since it uses less digits than its factorization.

331131320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5016 (or 5012 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 331131320 is about 18197.0140407705. The cubic root of 331131320 is about 691.8311091728.

Adding to 331131320 its reverse (23131133), we get a palindrome (354262453).

The spelling of 331131320 in words is "three hundred thirty-one million, one hundred thirty-one thousand, three hundred twenty".