31516455075899 has 2 divisors, whose sum is σ = 31516455075900. Its totient is φ = 31516455075898.

The previous prime is 31516455075827. The next prime is 31516455075913. The reversal of 31516455075899 is 99857055461513.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31516455075899 is a prime.

It is not a weakly prime, because it can be changed into another prime (31516455075199) 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, 15758227537949 + 15758227537950.

It is an arithmetic number, because the mean of its divisors is an integer number (15758227537950).

Almost surely, 2^{31516455075899} is an apocalyptic number.

31516455075899 is a deficient number, since it is larger than the sum of its proper divisors (1).

31516455075899 is an equidigital number, since it uses as much as digits as its factorization.

31516455075899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 204120000, while the sum is 68.

The spelling of 31516455075899 in words is "thirty-one trillion, five hundred sixteen billion, four hundred fifty-five million, seventy-five thousand, eight hundred ninety-nine".