31312122413 has 16 divisors (see below), whose sum is σ = 37006574976. Its totient is φ = 26118546240.

The previous prime is 31312122407. The next prime is 31312122427. The reversal of 31312122413 is 31422121313.

It is a cyclic number.

It is not a de Polignac number, because 31312122413 - 2⁴ = 31312122397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31312122433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 631706 + ... + 679467.

It is an arithmetic number, because the mean of its divisors is an integer number (2312910936).

Almost surely, 2^31312122413 is an apocalyptic number.

It is an amenable number.

31312122413 is a deficient number, since it is larger than the sum of its proper divisors (5694452563).

31312122413 is a wasteful number, since it uses less digits than its factorization.

31312122413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1311364.

The product of its digits is 864, while the sum is 23.

Adding to 31312122413 its reverse (31422121313), we get a palindrome (62734243726).

The spelling of 31312122413 in words is "thirty-one billion, three hundred twelve million, one hundred twenty-two thousand, four hundred thirteen".