318231 has 12 divisors (see below), whose sum is σ = 484120. Its totient is φ = 200880.

The previous prime is 318229. The next prime is 318233. The reversal of 318231 is 132813.

It is an interprime number because it is at equal distance from previous prime (318229) and next prime (318233).

It is not a de Polignac number, because 318231 - 2¹ = 318229 is a prime.

It is a super-2 number, since 2×318231² = 202541938722, which contains 22 as substring.

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 318231.

It is not an unprimeable number, because it can be changed into a prime (318233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 760 + ... + 1101.

2³¹⁸²³¹ is an apocalyptic number.

318231 is a deficient number, since it is larger than the sum of its proper divisors (165889).

318231 is a wasteful number, since it uses less digits than its factorization.

318231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1886 (or 1883 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 318231 is about 564.1196681556. The cubic root of 318231 is about 68.2727654201.

The spelling of 318231 in words is "three hundred eighteen thousand, two hundred thirty-one".