331731164 has 12 divisors (see below), whose sum is σ = 594689088. Its totient is φ = 161820000.

The previous prime is 331731157. The next prime is 331731221. The reversal of 331731164 is 461137133.

331731164 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×331731164² = 220091130337589792, which contains 22 as substring.

331731164 is strictly pandigital in base 9.

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, 1011212 + ... + 1011539.

It is an arithmetic number, because the mean of its divisors is an integer number (49557424).

Almost surely, 2^331731164 is an apocalyptic number.

It is an amenable number.

331731164 is a deficient number, since it is larger than the sum of its proper divisors (262957924).

331731164 is a wasteful number, since it uses less digits than its factorization.

331731164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2022796 (or 2022794 counting only the distinct ones).

The product of its digits is 4536, while the sum is 29.

The square root of 331731164 is about 18213.4885181285. The cubic root of 331731164 is about 692.2486075907.

Adding to 331731164 its reverse (461137133), we get a palindrome (792868297).

The spelling of 331731164 in words is "three hundred thirty-one million, seven hundred thirty-one thousand, one hundred sixty-four".