31745715317 has 2 divisors, whose sum is σ = 31745715318. Its totient is φ = 31745715316.

The previous prime is 31745715301. The next prime is 31745715319. The reversal of 31745715317 is 71351754713.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31744192561 + 1522756 = 178169^2 + 1234^2 .

It is a cyclic number.

It is not a de Polignac number, because 31745715317 - 2⁴ = 31745715301 is a prime.

Together with 31745715319, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31745715319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15872857658 + 15872857659.

It is an arithmetic number, because the mean of its divisors is an integer number (15872857659).

Almost surely, 2^31745715317 is an apocalyptic number.

It is an amenable number.

31745715317 is a deficient number, since it is larger than the sum of its proper divisors (1).

31745715317 is an equidigital number, since it uses as much as digits as its factorization.

31745715317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 308700, while the sum is 44.

The spelling of 31745715317 in words is "thirty-one billion, seven hundred forty-five million, seven hundred fifteen thousand, three hundred seventeen".