315722819 has 2 divisors, whose sum is σ = 315722820. Its totient is φ = 315722818.

The previous prime is 315722779. The next prime is 315722833. The reversal of 315722819 is 918227513.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 315722819 - 2²⁸ = 47287363 is a prime.

It is a super-2 number, since 2×315722819² = 199361796874613522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (315722119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157861409 + 157861410.

It is an arithmetic number, because the mean of its divisors is an integer number (157861410).

Almost surely, 2^315722819 is an apocalyptic number.

315722819 is a deficient number, since it is larger than the sum of its proper divisors (1).

315722819 is an equidigital number, since it uses as much as digits as its factorization.

315722819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 38.

The square root of 315722819 is about 17768.5907994979. The cubic root of 315722819 is about 680.9292507522.

The spelling of 315722819 in words is "three hundred fifteen million, seven hundred twenty-two thousand, eight hundred nineteen".