315147919 has 2 divisors, whose sum is σ = 315147920. Its totient is φ = 315147918.

The previous prime is 315147893. The next prime is 315147947. The reversal of 315147919 is 919741513.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 315147919 - 2⁹ = 315147407 is a prime.

It is a super-2 number, since 2×315147919² = 198636421700061122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315147979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157573959 + 157573960.

It is an arithmetic number, because the mean of its divisors is an integer number (157573960).

Almost surely, 2^315147919 is an apocalyptic number.

315147919 is a deficient number, since it is larger than the sum of its proper divisors (1).

315147919 is an equidigital number, since it uses as much as digits as its factorization.

315147919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34020, while the sum is 40.

The square root of 315147919 is about 17752.4060059475. The cubic root of 315147919 is about 680.5156980508.

The spelling of 315147919 in words is "three hundred fifteen million, one hundred forty-seven thousand, nine hundred nineteen".