331887 has 4 divisors (see below), whose sum is σ = 442520. Its totient is φ = 221256.

The previous prime is 331883. The next prime is 331889. The reversal of 331887 is 788133.

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

It is not a de Polignac number, because 331887 - 2² = 331883 is a prime.

It is a super-2 number, since 2×331887² = 220297961538, which contains 22 as substring.

It is a D-number.

It is a Duffinian 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, 55312 + ... + 55317.

It is an arithmetic number, because the mean of its divisors is an integer number (110630).

2³³¹⁸⁸⁷ is an apocalyptic number.

331887 is a deficient number, since it is larger than the sum of its proper divisors (110633).

331887 is a wasteful number, since it uses less digits than its factorization.

331887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110632.

The product of its digits is 4032, while the sum is 30.

The square root of 331887 is about 576.0963461089. The cubic root of 331887 is about 69.2356988892.

The spelling of 331887 in words is "three hundred thirty-one thousand, eight hundred eighty-seven".