12313131432 has 64 divisors (see below), whose sum is σ = 36131214720. Its totient is φ = 3422953728.

The previous prime is 12313131421. The next prime is 12313131451. The reversal of 12313131432 is 23413131321.

It is a super-2 number, since 2×12313131432² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 984223 + ... + 996654.

It is an arithmetic number, because the mean of its divisors is an integer number (564550230).

Almost surely, 2^12313131432 is an apocalyptic number.

12313131432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12313131432 is an abundant number, since it is smaller than the sum of its proper divisors (23818083288).

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

12313131432 is a wasteful number, since it uses less digits than its factorization.

12313131432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1980930 (or 1980926 counting only the distinct ones).

The product of its digits is 1296, while the sum is 24.

Adding to 12313131432 its reverse (23413131321), we get a palindrome (35726262753).

The spelling of 12313131432 in words is "twelve billion, three hundred thirteen million, one hundred thirty-one thousand, four hundred thirty-two".