312403404631 has 2 divisors, whose sum is σ = 312403404632. Its totient is φ = 312403404630.

The previous prime is 312403404619. The next prime is 312403404647. The reversal of 312403404631 is 136404304213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 312403404631 - 2¹⁹ = 312402880343 is a prime.

It is a super-2 number, since 2×312403404631² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 312403404593 and 312403404602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312403404601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156201702315 + 156201702316.

It is an arithmetic number, because the mean of its divisors is an integer number (156201702316).

Almost surely, 2^312403404631 is an apocalyptic number.

312403404631 is a deficient number, since it is larger than the sum of its proper divisors (1).

312403404631 is an equidigital number, since it uses as much as digits as its factorization.

312403404631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 31.

Adding to 312403404631 its reverse (136404304213), we get a palindrome (448807708844).

The spelling of 312403404631 in words is "three hundred twelve billion, four hundred three million, four hundred four thousand, six hundred thirty-one".