312494137922 has 54 divisors (see below), whose sum is σ = 498052631961. Its totient is φ = 147044532000.

The previous prime is 312494137913. The next prime is 312494137931. The reversal of 312494137922 is 229731494213.

It is an interprime number because it is at equal distance from previous prime (312494137913) and next prime (312494137931).

It can be written as a sum of positive squares in 2 ways, for example, as 223170263281 + 89323874641 = 472409^2 + 298871^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=395281.

It is a super-2 number, since 2×312494137922² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1004804147 + ... + 1004804457.

Almost surely, 2^312494137922 is an apocalyptic number.

312494137922 is a deficient number, since it is larger than the sum of its proper divisors (185558494039).

312494137922 is an frugal number, since it uses more digits than its factorization.

312494137922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768 (or 385 counting only the distinct ones).

The product of its digits is 653184, while the sum is 47.

The spelling of 312494137922 in words is "three hundred twelve billion, four hundred ninety-four million, one hundred thirty-seven thousand, nine hundred twenty-two".