31717287144317 has 2 divisors, whose sum is σ = 31717287144318. Its totient is φ = 31717287144316.

The previous prime is 31717287144269. The next prime is 31717287144343. The reversal of 31717287144317 is 71344178271713.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24034888646521 + 7682398497796 = 4902539^2 + 2771714^2 .

It is an emirp because it is prime and its reverse (71344178271713) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31717287144317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31717287144617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15858643572158 + 15858643572159.

It is an arithmetic number, because the mean of its divisors is an integer number (15858643572159).

Almost surely, 2^{31717287144317} is an apocalyptic number.

It is an amenable number.

31717287144317 is a deficient number, since it is larger than the sum of its proper divisors (1).

31717287144317 is an equidigital number, since it uses as much as digits as its factorization.

31717287144317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5531904, while the sum is 56.

The spelling of 31717287144317 in words is "thirty-one trillion, seven hundred seventeen billion, two hundred eighty-seven million, one hundred forty-four thousand, three hundred seventeen".