31310023113217 has 2 divisors, whose sum is σ = 31310023113218. Its totient is φ = 31310023113216.

The previous prime is 31310023113163. The next prime is 31310023113221. The reversal of 31310023113217 is 71231132001313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30142998789696 + 1167024323521 = 5490264^2 + 1080289^2 .

It is a cyclic number.

It is not a de Polignac number, because 31310023113217 - 2¹⁵ = 31310023080449 is a prime.

It is not a weakly prime, because it can be changed into another prime (31310023113247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15655011556608 + 15655011556609.

It is an arithmetic number, because the mean of its divisors is an integer number (15655011556609).

Almost surely, 2^{31310023113217} is an apocalyptic number.

It is an amenable number.

31310023113217 is a deficient number, since it is larger than the sum of its proper divisors (1).

31310023113217 is an equidigital number, since it uses as much as digits as its factorization.

31310023113217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 28.

The spelling of 31310023113217 in words is "thirty-one trillion, three hundred ten billion, twenty-three million, one hundred thirteen thousand, two hundred seventeen".