31004005251612 has 24 divisors (see below), whose sum is σ = 72870727675536. Its totient is φ = 10259232880768.

The previous prime is 31004005251559. The next prime is 31004005251629. The reversal of 31004005251612 is 21615250040013.

It is a super-2 number, since 2×31004005251612² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31004005251612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9429440343 + ... + 9429443630.

It is an arithmetic number, because the mean of its divisors is an integer number (3036280319814).

Almost surely, 2^{31004005251612} is an apocalyptic number.

It is an amenable number.

31004005251612 is an abundant number, since it is smaller than the sum of its proper divisors (41866722423924).

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

31004005251612 is a wasteful number, since it uses less digits than its factorization.

31004005251612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18858884117 (or 18858884115 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 31004005251612 its reverse (21615250040013), we get a palindrome (52619255291625).

The spelling of 31004005251612 in words is "thirty-one trillion, four billion, five million, two hundred fifty-one thousand, six hundred twelve".