313731 has 12 divisors (see below), whose sum is σ = 494520. Its totient is φ = 190080.

The previous prime is 313727. The next prime is 313739. The reversal of 313731 is 137313.

It is not a de Polignac number, because 313731 - 2² = 313727 is a prime.

It is a super-2 number, since 2×313731² = 196854280722, which contains 22 as substring.

It is a plaindrome in base 7.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 313731.

It is not an unprimeable number, because it can be changed into a prime (313739) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1486 + ... + 1683.

It is an arithmetic number, because the mean of its divisors is an integer number (41210).

2³¹³⁷³¹ is an apocalyptic number.

313731 is a deficient number, since it is larger than the sum of its proper divisors (180789).

313731 is a wasteful number, since it uses less digits than its factorization.

313731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3186 (or 3183 counting only the distinct ones).

The product of its digits is 189, while the sum is 18.

The square root of 313731 is about 560.1169520734. The cubic root of 313731 is about 67.9494289514.

The spelling of 313731 in words is "three hundred thirteen thousand, seven hundred thirty-one".