315161291 has 2 divisors, whose sum is σ = 315161292. Its totient is φ = 315161290.

The previous prime is 315161281. The next prime is 315161323. The reversal of 315161291 is 192161513.

It is a weak prime.

It is an emirp because it is prime and its reverse (192161513) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 315161291 - 2²² = 310966987 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (315161201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157580645 + 157580646.

It is an arithmetic number, because the mean of its divisors is an integer number (157580646).

Almost surely, 2^315161291 is an apocalyptic number.

315161291 is a deficient number, since it is larger than the sum of its proper divisors (1).

315161291 is an equidigital number, since it uses as much as digits as its factorization.

315161291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1620, while the sum is 29.

The square root of 315161291 is about 17752.7826269574. The cubic root of 315161291 is about 680.5253228721.

The spelling of 315161291 in words is "three hundred fifteen million, one hundred sixty-one thousand, two hundred ninety-one".