315101209 has 2 divisors, whose sum is σ = 315101210. Its totient is φ = 315101208.

The previous prime is 315101191. The next prime is 315101221. The reversal of 315101209 is 902101513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 222845184 + 92256025 = 14928^2 + 9605^2 .

It is a cyclic number.

It is not a de Polignac number, because 315101209 - 2²¹ = 313004057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 315101209.

It is not a weakly prime, because it can be changed into another prime (315101009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157550604 + 157550605.

It is an arithmetic number, because the mean of its divisors is an integer number (157550605).

Almost surely, 2^315101209 is an apocalyptic number.

It is an amenable number.

315101209 is a deficient number, since it is larger than the sum of its proper divisors (1).

315101209 is an equidigital number, since it uses as much as digits as its factorization.

315101209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 315101209 is about 17751.0903608764. The cubic root of 315101209 is about 680.4820752588.

The spelling of 315101209 in words is "three hundred fifteen million, one hundred one thousand, two hundred nine".