31013231031217 has 2 divisors, whose sum is σ = 31013231031218. Its totient is φ = 31013231031216.

The previous prime is 31013231031203. The next prime is 31013231031247. The reversal of 31013231031217 is 71213013231013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30841573283361 + 171657747856 = 5553519^2 + 414316^2 .

It is a cyclic number.

It is not a de Polignac number, because 31013231031217 - 2⁷ = 31013231031089 is a prime.

It is not a weakly prime, because it can be changed into another prime (31013231031247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15506615515608 + 15506615515609.

It is an arithmetic number, because the mean of its divisors is an integer number (15506615515609).

Almost surely, 2^{31013231031217} is an apocalyptic number.

It is an amenable number.

31013231031217 is a deficient number, since it is larger than the sum of its proper divisors (1).

31013231031217 is an equidigital number, since it uses as much as digits as its factorization.

31013231031217 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 31013231031217 in words is "thirty-one trillion, thirteen billion, two hundred thirty-one million, thirty-one thousand, two hundred seventeen".