331947 has 24 divisors (see below), whose sum is σ = 599040. Its totient is φ = 172080.

The previous prime is 331943. The next prime is 331957. The reversal of 331947 is 749133.

It is not a de Polignac number, because 331947 - 2² = 331943 is a prime.

It is a super-2 number, since 2×331947² = 220377621618, which contains 22 as substring.

It is a nialpdrome in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 331947.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 331947.

It is not an unprimeable number, because it can be changed into a prime (331943) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 454 + ... + 932.

It is an arithmetic number, because the mean of its divisors is an integer number (24960).

2³³¹⁹⁴⁷ is an apocalyptic number.

331947 is a deficient number, since it is larger than the sum of its proper divisors (267093).

331947 is a wasteful number, since it uses less digits than its factorization.

331947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503 (or 500 counting only the distinct ones).

The product of its digits is 2268, while the sum is 27.

The square root of 331947 is about 576.1484183785. The cubic root of 331947 is about 69.2398708831.

The spelling of 331947 in words is "three hundred thirty-one thousand, nine hundred forty-seven".