317631 has 8 divisors (see below), whose sum is σ = 426240. Its totient is φ = 210392.

The previous prime is 317621. The next prime is 317651. The reversal of 317631 is 136713.

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

It is a cyclic number.

It is not a de Polignac number, because 317631 - 2⁵ = 317599 is a prime.

It is a super-2 number, since 2×317631² = 201778904322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 317598 and 317607.

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 317631.

It is not an unprimeable number, because it can be changed into a prime (317621) 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, 496 + ... + 938.

It is an arithmetic number, because the mean of its divisors is an integer number (53280).

2³¹⁷⁶³¹ is an apocalyptic number.

317631 is a deficient number, since it is larger than the sum of its proper divisors (108609).

317631 is a wasteful number, since it uses less digits than its factorization.

317631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685.

The product of its digits is 378, while the sum is 21.

The square root of 317631 is about 563.5876151939. The cubic root of 317631 is about 68.2298307480.

The spelling of 317631 in words is "three hundred seventeen thousand, six hundred thirty-one".