312021992 has 16 divisors (see below), whose sum is σ = 585549540. Its totient is φ = 155875456.

The previous prime is 312021907. The next prime is 312022001. The reversal of 312021992 is 299120213.

It can be written as a sum of positive squares in 2 ways, for example, as 282710596 + 29311396 = 16814^2 + 5414^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6803 + ... + 25890.

Almost surely, 2^312021992 is an apocalyptic number.

It is an amenable number.

312021992 is a deficient number, since it is larger than the sum of its proper divisors (273527548).

312021992 is a wasteful number, since it uses less digits than its factorization.

312021992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33892 (or 33888 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 312021992 is about 17664.1442475994. The cubic root of 312021992 is about 678.2582240237.

The spelling of 312021992 in words is "three hundred twelve million, twenty-one thousand, nine hundred ninety-two".