2315565691 has 2 divisors, whose sum is σ = 2315565692. Its totient is φ = 2315565690.

The previous prime is 2315565683. The next prime is 2315565731. The reversal of 2315565691 is 1965655132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2315565691 - 2³ = 2315565683 is a prime.

It is not a weakly prime, because it can be changed into another prime (2315565661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1157782845 + 1157782846.

It is an arithmetic number, because the mean of its divisors is an integer number (1157782846).

Almost surely, 2^2315565691 is an apocalyptic number.

2315565691 is a deficient number, since it is larger than the sum of its proper divisors (1).

2315565691 is an equidigital number, since it uses as much as digits as its factorization.

2315565691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 243000, while the sum is 43.

The square root of 2315565691 is about 48120.3251339805. The cubic root of 2315565691 is about 1322.9772275082.

The spelling of 2315565691 in words is "two billion, three hundred fifteen million, five hundred sixty-five thousand, six hundred ninety-one".