315565009 has 2 divisors, whose sum is σ = 315565010. Its totient is φ = 315565008.

The previous prime is 315565001. The next prime is 315565013. The reversal of 315565009 is 900565513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 173001409 + 142563600 = 13153^2 + 11940^2 .

It is a cyclic number.

It is not a de Polignac number, because 315565009 - 2³ = 315565001 is a prime.

It is not a weakly prime, because it can be changed into another prime (315565001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157782504 + 157782505.

It is an arithmetic number, because the mean of its divisors is an integer number (157782505).

Almost surely, 2^315565009 is an apocalyptic number.

It is an amenable number.

315565009 is a deficient number, since it is larger than the sum of its proper divisors (1).

315565009 is an equidigital number, since it uses as much as digits as its factorization.

315565009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20250, while the sum is 34.

The square root of 315565009 is about 17764.1495433922. The cubic root of 315565009 is about 680.8157805949.

The spelling of 315565009 in words is "three hundred fifteen million, five hundred sixty-five thousand, nine".