315192209 has 2 divisors, whose sum is σ = 315192210. Its totient is φ = 315192208.

The previous prime is 315192203. The next prime is 315192239. The reversal of 315192209 is 902291513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 312052225 + 3139984 = 17665^2 + 1772^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-315192209 is a prime.

It is a super-2 number, since 2×315192209² = 198692257228599362, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (315192203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157596104 + 157596105.

It is an arithmetic number, because the mean of its divisors is an integer number (157596105).

Almost surely, 2^315192209 is an apocalyptic number.

It is an amenable number.

315192209 is a deficient number, since it is larger than the sum of its proper divisors (1).

315192209 is an equidigital number, since it uses as much as digits as its factorization.

315192209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 315192209 is about 17753.6533986670. The cubic root of 315192209 is about 680.5475758101.

The spelling of 315192209 in words is "three hundred fifteen million, one hundred ninety-two thousand, two hundred nine".