31002131712 has 72 divisors (see below), whose sum is σ = 82548378976. Its totient is φ = 10329348096.

The previous prime is 31002131711. The next prime is 31002131737. The reversal of 31002131712 is 21713120013.

It is a happy number.

It is a super-2 number, since 2×31002131712² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31002131711) 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, 1955883 + ... + 1971669.

Almost surely, 2^31002131712 is an apocalyptic number.

31002131712 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31002131712 is an abundant number, since it is smaller than the sum of its proper divisors (51546247264).

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

31002131712 is a wasteful number, since it uses less digits than its factorization.

31002131712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18363 (or 18349 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 21.

Adding to 31002131712 its reverse (21713120013), we get a palindrome (52715251725).

The spelling of 31002131712 in words is "thirty-one billion, two million, one hundred thirty-one thousand, seven hundred twelve".