312231996 has 60 divisors (see below), whose sum is σ = 864265248. Its totient is φ = 97953408.

The previous prime is 312231971. The next prime is 312232007. The reversal of 312231996 is 699132213.

It is a happy number.

It is a super-2 number, since 2×312231996² = 194977638652288032, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 312231996.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 22836 + ... + 33851.

Almost surely, 2^312231996 is an apocalyptic number.

312231996 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

312231996 is an abundant number, since it is smaller than the sum of its proper divisors (552033252).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

312231996 is a wasteful number, since it uses less digits than its factorization.

312231996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56720 (or 56709 counting only the distinct ones).

The product of its digits is 17496, while the sum is 36.

The square root of 312231996 is about 17670.0876058949. The cubic root of 312231996 is about 678.4103553909.

The spelling of 312231996 in words is "three hundred twelve million, two hundred thirty-one thousand, nine hundred ninety-six".