315125823075991 has 2 divisors, whose sum is σ = 315125823075992. Its totient is φ = 315125823075990.

The previous prime is 315125823075983. The next prime is 315125823076037. The reversal of 315125823075991 is 199570328521513.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 315125823075991 - 2³ = 315125823075983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315125823075941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157562911537995 + 157562911537996.

It is an arithmetic number, because the mean of its divisors is an integer number (157562911537996).

Almost surely, 2^{315125823075991} is an apocalyptic number.

315125823075991 is a deficient number, since it is larger than the sum of its proper divisors (1).

315125823075991 is an equidigital number, since it uses as much as digits as its factorization.

315125823075991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412000, while the sum is 61.

The spelling of 315125823075991 in words is "three hundred fifteen trillion, one hundred twenty-five billion, eight hundred twenty-three million, seventy-five thousand, nine hundred ninety-one".