315212320169 has 2 divisors, whose sum is σ = 315212320170. Its totient is φ = 315212320168.

The previous prime is 315212320103. The next prime is 315212320187. The reversal of 315212320169 is 961023212513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 310137610000 + 5074710169 = 556900^2 + 71237^2 .

It is a cyclic number.

It is not a de Polignac number, because 315212320169 - 2²⁰ = 315211271593 is a prime.

It is a super-2 number, since 2×315212320169² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (315212320069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157606160084 + 157606160085.

It is an arithmetic number, because the mean of its divisors is an integer number (157606160085).

Almost surely, 2^315212320169 is an apocalyptic number.

It is an amenable number.

315212320169 is a deficient number, since it is larger than the sum of its proper divisors (1).

315212320169 is an equidigital number, since it uses as much as digits as its factorization.

315212320169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 35.

The spelling of 315212320169 in words is "three hundred fifteen billion, two hundred twelve million, three hundred twenty thousand, one hundred sixty-nine".