318474631 has 2 divisors, whose sum is σ = 318474632. Its totient is φ = 318474630.

The previous prime is 318474623. The next prime is 318474643. The reversal of 318474631 is 136474813.

It is a weak prime.

It is an emirp because it is prime and its reverse (136474813) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 318474631 - 2³ = 318474623 is a prime.

It is a super-2 number, since 2×318474631² = 202852181181172322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (318474671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159237315 + 159237316.

It is an arithmetic number, because the mean of its divisors is an integer number (159237316).

Almost surely, 2^318474631 is an apocalyptic number.

318474631 is a deficient number, since it is larger than the sum of its proper divisors (1).

318474631 is an equidigital number, since it uses as much as digits as its factorization.

318474631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 37.

The square root of 318474631 is about 17845.8575305307. The cubic root of 318474631 is about 682.9018370972.

It can be divided in two parts, 3184 and 74631, that added together give a triangular number (77815 = T₃₉₄).

The spelling of 318474631 in words is "three hundred eighteen million, four hundred seventy-four thousand, six hundred thirty-one".