315329909491 has 2 divisors, whose sum is σ = 315329909492. Its totient is φ = 315329909490.

The previous prime is 315329909369. The next prime is 315329909507. The reversal of 315329909491 is 194909923513.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 315329909491 - 2⁹ = 315329908979 is a prime.

It is not a weakly prime, because it can be changed into another prime (315329909291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157664954745 + 157664954746.

It is an arithmetic number, because the mean of its divisors is an integer number (157664954746).

Almost surely, 2^315329909491 is an apocalyptic number.

315329909491 is a deficient number, since it is larger than the sum of its proper divisors (1).

315329909491 is an equidigital number, since it uses as much as digits as its factorization.

315329909491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2361960, while the sum is 55.

The spelling of 315329909491 in words is "three hundred fifteen billion, three hundred twenty-nine million, nine hundred nine thousand, four hundred ninety-one".