312330631 has 2 divisors, whose sum is σ = 312330632. Its totient is φ = 312330630.

The previous prime is 312330563. The next prime is 312330679. The reversal of 312330631 is 136033213.

It is a strong prime.

It is an emirp because it is prime and its reverse (136033213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 312330631 - 2⁷ = 312330503 is a prime.

It is a super-2 number, since 2×312330631² = 195100846121716322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312330691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156165315 + 156165316.

It is an arithmetic number, because the mean of its divisors is an integer number (156165316).

Almost surely, 2^312330631 is an apocalyptic number.

312330631 is a deficient number, since it is larger than the sum of its proper divisors (1).

312330631 is an equidigital number, since it uses as much as digits as its factorization.

312330631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 22.

The square root of 312330631 is about 17672.8784016639. The cubic root of 312330631 is about 678.4817851411.

Adding to 312330631 its reverse (136033213), we get a palindrome (448363844).

The spelling of 312330631 in words is "three hundred twelve million, three hundred thirty thousand, six hundred thirty-one".