31711796513 has 2 divisors, whose sum is σ = 31711796514. Its totient is φ = 31711796512.

The previous prime is 31711796453. The next prime is 31711796527. The reversal of 31711796513 is 31569711713.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16063788049 + 15648008464 = 126743^2 + 125092^2 .

It is an emirp because it is prime and its reverse (31569711713) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31711796513 - 2⁶ = 31711796449 is a prime.

It is not a weakly prime, because it can be changed into another prime (31711796533) 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, 15855898256 + 15855898257.

It is an arithmetic number, because the mean of its divisors is an integer number (15855898257).

Almost surely, 2^31711796513 is an apocalyptic number.

It is an amenable number.

31711796513 is a deficient number, since it is larger than the sum of its proper divisors (1).

31711796513 is an equidigital number, since it uses as much as digits as its factorization.

31711796513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 119070, while the sum is 44.

The spelling of 31711796513 in words is "thirty-one billion, seven hundred eleven million, seven hundred ninety-six thousand, five hundred thirteen".