315864919 has 2 divisors, whose sum is σ = 315864920. Its totient is φ = 315864918.

The previous prime is 315864869. The next prime is 315864953. The reversal of 315864919 is 919468513.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 315864919 - 2¹⁹ = 315340631 is a prime.

It is a super-2 number, since 2×315864919² = 199541294109753122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315864959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157932459 + 157932460.

It is an arithmetic number, because the mean of its divisors is an integer number (157932460).

Almost surely, 2^315864919 is an apocalyptic number.

315864919 is a deficient number, since it is larger than the sum of its proper divisors (1).

315864919 is an equidigital number, since it uses as much as digits as its factorization.

315864919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 46.

The square root of 315864919 is about 17772.5889785366. The cubic root of 315864919 is about 681.0313925971.

The spelling of 315864919 in words is "three hundred fifteen million, eight hundred sixty-four thousand, nine hundred nineteen".