331920856 has 16 divisors (see below), whose sum is σ = 625482000. Its totient is φ = 165125664.

The previous prime is 331920847. The next prime is 331920859. The reversal of 331920856 is 658029133.

331920856 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 2×331920856² = 220342909295545472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331920859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102655 + ... + 105838.

It is an arithmetic number, because the mean of its divisors is an integer number (39092625).

Almost surely, 2^331920856 is an apocalyptic number.

It is an amenable number.

331920856 is a deficient number, since it is larger than the sum of its proper divisors (293561144).

331920856 is a wasteful number, since it uses less digits than its factorization.

331920856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208698 (or 208694 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 331920856 is about 18218.6952331938. The cubic root of 331920856 is about 692.3805306814.

Adding to 331920856 its reverse (658029133), we get a palindrome (989949989).

The spelling of 331920856 in words is "three hundred thirty-one million, nine hundred twenty thousand, eight hundred fifty-six".