331885 has 4 divisors (see below), whose sum is σ = 398268. Its totient is φ = 265504.

The previous prime is 331883. The next prime is 331889. The reversal of 331885 is 588133.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 233289 + 98596 = 483^2 + 314^2 .

It is a cyclic number.

It is not a de Polignac number, because 331885 - 2¹ = 331883 is a prime.

It is a super-2 number, since 2×331885² = 220295306450, which contains 22 as substring.

It is a Duffinian number.

331885 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331883) 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, 33184 + ... + 33193.

It is an arithmetic number, because the mean of its divisors is an integer number (99567).

2³³¹⁸⁸⁵ is an apocalyptic number.

It is an amenable number.

331885 is a deficient number, since it is larger than the sum of its proper divisors (66383).

331885 is an equidigital number, since it uses as much as digits as its factorization.

331885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66382.

The product of its digits is 2880, while the sum is 28.

The square root of 331885 is about 576.0946102855. The cubic root of 331885 is about 69.2355598141.

It can be divided in two parts, 3318 and 85, that added together give a triangular number (3403 = T₈₂).

The spelling of 331885 in words is "three hundred thirty-one thousand, eight hundred eighty-five".