31311200213017 has 2 divisors, whose sum is σ = 31311200213018. Its totient is φ = 31311200213016.

The previous prime is 31311200212951. The next prime is 31311200213039. The reversal of 31311200213017 is 71031200211313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30338019936016 + 973180277001 = 5507996^2 + 986499^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31311200213017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31311200212982 and 31311200213000.

It is not a weakly prime, because it can be changed into another prime (31311200213317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15655600106508 + 15655600106509.

It is an arithmetic number, because the mean of its divisors is an integer number (15655600106509).

Almost surely, 2^{31311200213017} is an apocalyptic number.

It is an amenable number.

31311200213017 is a deficient number, since it is larger than the sum of its proper divisors (1).

31311200213017 is an equidigital number, since it uses as much as digits as its factorization.

31311200213017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 25.

The spelling of 31311200213017 in words is "thirty-one trillion, three hundred eleven billion, two hundred million, two hundred thirteen thousand, seventeen".