315613919 has 2 divisors, whose sum is σ = 315613920. Its totient is φ = 315613918.

The previous prime is 315613877. The next prime is 315613933. The reversal of 315613919 is 919316513.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-315613919 is a prime.

It is a super-2 number, since 2×315613919² = 199224291733077122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315613979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157806959 + 157806960.

It is an arithmetic number, because the mean of its divisors is an integer number (157806960).

Almost surely, 2^315613919 is an apocalyptic number.

315613919 is a deficient number, since it is larger than the sum of its proper divisors (1).

315613919 is an equidigital number, since it uses as much as digits as its factorization.

315613919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21870, while the sum is 38.

The square root of 315613919 is about 17765.5261391269. The cubic root of 315613919 is about 680.8509524070.

The spelling of 315613919 in words is "three hundred fifteen million, six hundred thirteen thousand, nine hundred nineteen".