313631 has 4 divisors (see below), whose sum is σ = 320352. Its totient is φ = 306912.

The previous prime is 313619. The next prime is 313637. The reversal of 313631 is 136313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 136313 = 271 ⋅503.

It is a cyclic number.

It is not a de Polignac number, because 313631 - 2⁶ = 313567 is a prime.

It is a super-2 number, since 2×313631² = 196728808322, 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 313631.

It is not an unprimeable number, because it can be changed into a prime (313637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3290 + ... + 3383.

It is an arithmetic number, because the mean of its divisors is an integer number (80088).

2³¹³⁶³¹ is an apocalyptic number.

313631 is a deficient number, since it is larger than the sum of its proper divisors (6721).

313631 is an equidigital number, since it uses as much as digits as its factorization.

313631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6720.

The product of its digits is 162, while the sum is 17.

The square root of 313631 is about 560.0276778874. The cubic root of 313631 is about 67.9422086841.

Adding to 313631 its reverse (136313), we get a palindrome (449944).

The spelling of 313631 in words is "three hundred thirteen thousand, six hundred thirty-one".