1312231996 has 24 divisors (see below), whose sum is σ = 2324327040. Its totient is φ = 648168000.

The previous prime is 1312231981. The next prime is 1312231997. The reversal of 1312231996 is 6991322131.

It is a super-2 number, since 2×1312231996² = 3443905622652288032, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312231997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190126 + ... + 196906.

It is an arithmetic number, because the mean of its divisors is an integer number (96846960).

Almost surely, 2^1312231996 is an apocalyptic number.

It is an amenable number.

1312231996 is a deficient number, since it is larger than the sum of its proper divisors (1012095044).

1312231996 is a wasteful number, since it uses less digits than its factorization.

1312231996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7365 (or 7363 counting only the distinct ones).

The product of its digits is 17496, while the sum is 37.

The square root of 1312231996 is about 36224.7428700329. The cubic root of 1312231996 is about 1094.8052574452.

The spelling of 1312231996 in words is "one billion, three hundred twelve million, two hundred thirty-one thousand, nine hundred ninety-six".