315105191 has 2 divisors, whose sum is σ = 315105192. Its totient is φ = 315105190.

The previous prime is 315105187. The next prime is 315105257. The reversal of 315105191 is 191501513.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 315105191 - 2² = 315105187 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 315105191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315105151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157552595 + 157552596.

It is an arithmetic number, because the mean of its divisors is an integer number (157552596).

Almost surely, 2^315105191 is an apocalyptic number.

315105191 is a deficient number, since it is larger than the sum of its proper divisors (1).

315105191 is an equidigital number, since it uses as much as digits as its factorization.

315105191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 675, while the sum is 26.

The square root of 315105191 is about 17751.2025226462. The cubic root of 315105191 is about 680.4849417116.

The spelling of 315105191 in words is "three hundred fifteen million, one hundred five thousand, one hundred ninety-one".