331287 has 8 divisors (see below), whose sum is σ = 481920. Its totient is φ = 200760.

The previous prime is 331283. The next prime is 331301. The reversal of 331287 is 782133.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 331287 - 2² = 331283 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4987 + ... + 5052.

It is an arithmetic number, because the mean of its divisors is an integer number (60240).

2³³¹²⁸⁷ is an apocalyptic number.

331287 is a deficient number, since it is larger than the sum of its proper divisors (150633).

331287 is a wasteful number, since it uses less digits than its factorization.

331287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10053.

The product of its digits is 1008, while the sum is 24.

The square root of 331287 is about 575.5753643095. The cubic root of 331287 is about 69.1939512683.

The spelling of 331287 in words is "three hundred thirty-one thousand, two hundred eighty-seven".