331864 has 16 divisors (see below), whose sum is σ = 670320. Its totient is φ = 153120.

The previous prime is 331843. The next prime is 331871. The reversal of 331864 is 468133.

It is a super-2 number, since 2×331864² = 220267428992, which 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 3 ways as a sum of consecutive naturals, for example, 1492 + ... + 1699.

It is an arithmetic number, because the mean of its divisors is an integer number (41895).

2³³¹⁸⁶⁴ is an apocalyptic number.

It is an amenable number.

331864 is an abundant number, since it is smaller than the sum of its proper divisors (338456).

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

331864 is a wasteful number, since it uses less digits than its factorization.

331864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3210 (or 3206 counting only the distinct ones).

The product of its digits is 1728, while the sum is 25.

The square root of 331864 is about 576.0763838242. The cubic root of 331864 is about 69.2340994916.

Adding to 331864 its reverse (468133), we get a palindrome (799997).

The spelling of 331864 in words is "three hundred thirty-one thousand, eight hundred sixty-four".