31312313113 has 2 divisors, whose sum is σ = 31312313114. Its totient is φ = 31312313112.

The previous prime is 31312313083. The next prime is 31312313117. The reversal of 31312313113 is 31131321313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30313247449 + 999065664 = 174107^2 + 31608^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31312313113 is a prime.

It is not a weakly prime, because it can be changed into another prime (31312313117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15656156556 + 15656156557.

It is an arithmetic number, because the mean of its divisors is an integer number (15656156557).

Almost surely, 2^31312313113 is an apocalyptic number.

It is an amenable number.

31312313113 is a deficient number, since it is larger than the sum of its proper divisors (1).

31312313113 is an equidigital number, since it uses as much as digits as its factorization.

31312313113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 486, while the sum is 22.

Adding to 31312313113 its reverse (31131321313), we get a palindrome (62443634426).

The spelling of 31312313113 in words is "thirty-one billion, three hundred twelve million, three hundred thirteen thousand, one hundred thirteen".