31313306105797 has 2 divisors, whose sum is σ = 31313306105798. Its totient is φ = 31313306105796.

The previous prime is 31313306105779. The next prime is 31313306105803. The reversal of 31313306105797 is 79750160331313.

Together with previous prime (31313306105779) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23367227289156 + 7946078816641 = 4833966^2 + 2818879^2 .

It is a cyclic number.

It is not a de Polignac number, because 31313306105797 - 2³⁵ = 31278946367429 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31313306105797.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31313306105777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15656653052898 + 15656653052899.

It is an arithmetic number, because the mean of its divisors is an integer number (15656653052899).

Almost surely, 2^{31313306105797} is an apocalyptic number.

It is an amenable number.

31313306105797 is a deficient number, since it is larger than the sum of its proper divisors (1).

31313306105797 is an equidigital number, since it uses as much as digits as its factorization.

31313306105797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1071630, while the sum is 49.

The spelling of 31313306105797 in words is "thirty-one trillion, three hundred thirteen billion, three hundred six million, one hundred five thousand, seven hundred ninety-seven".