316631 has 4 divisors (see below), whose sum is σ = 361872. Its totient is φ = 271392.

The previous prime is 316621. The next prime is 316633. The reversal of 316631 is 136613.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 136613 = 67 ⋅2039.

It is a cyclic number.

It is not a de Polignac number, because 316631 - 2⁶ = 316567 is a prime.

It is a super-2 number, since 2×316631² = 200510380322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (316633) 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 3 ways as a sum of consecutive naturals, for example, 22610 + ... + 22623.

It is an arithmetic number, because the mean of its divisors is an integer number (90468).

2³¹⁶⁶³¹ is an apocalyptic number.

316631 is a deficient number, since it is larger than the sum of its proper divisors (45241).

316631 is an equidigital number, since it uses as much as digits as its factorization.

316631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45240.

The product of its digits is 324, while the sum is 20.

The square root of 316631 is about 562.6997423138. The cubic root of 316631 is about 68.1581526487.

It can be divided in two parts, 316 and 631, that multiplied together give a triangular number (199396 = T₆₃₁).

The spelling of 316631 in words is "three hundred sixteen thousand, six hundred thirty-one".