31215322312004 has 6 divisors (see below), whose sum is σ = 54626814046014. Its totient is φ = 15607661156000.

The previous prime is 31215322311941. The next prime is 31215322312039. The reversal of 31215322312004 is 40021322351213.

It can be written as a sum of positive squares in only one way, i.e., 30163733591104 + 1051588720900 = 5492152^2 + 1025470^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3901915288997 + ... + 3901915289004.

It is an arithmetic number, because the mean of its divisors is an integer number (9104469007669).

Almost surely, 2^{31215322312004} is an apocalyptic number.

It is an amenable number.

31215322312004 is a deficient number, since it is larger than the sum of its proper divisors (23411491734010).

31215322312004 is a wasteful number, since it uses less digits than its factorization.

31215322312004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7803830578005 (or 7803830578003 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

Adding to 31215322312004 its reverse (40021322351213), we get a palindrome (71236644663217).

The spelling of 31215322312004 in words is "thirty-one trillion, two hundred fifteen billion, three hundred twenty-two million, three hundred twelve thousand, four".