315056809 has 2 divisors, whose sum is σ = 315056810. Its totient is φ = 315056808.

The previous prime is 315056789. The next prime is 315056827. The reversal of 315056809 is 908650513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 270701209 + 44355600 = 16453^2 + 6660^2 .

It is a cyclic number.

It is not a de Polignac number, because 315056809 - 2¹⁵ = 315024041 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (315056849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157528404 + 157528405.

It is an arithmetic number, because the mean of its divisors is an integer number (157528405).

Almost surely, 2^315056809 is an apocalyptic number.

It is an amenable number.

315056809 is a deficient number, since it is larger than the sum of its proper divisors (1).

315056809 is an equidigital number, since it uses as much as digits as its factorization.

315056809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 315056809 is about 17749.8396894169. The cubic root of 315056809 is about 680.4501121704.

The spelling of 315056809 in words is "three hundred fifteen million, fifty-six thousand, eight hundred nine".