315421919 has 2 divisors, whose sum is σ = 315421920. Its totient is φ = 315421918.

The previous prime is 315421913. The next prime is 315421933. The reversal of 315421919 is 919124513.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (919124513) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 315421919 - 2²⁰ = 314373343 is a prime.

It is a super-2 number, since 2×315421919² = 198981973971285122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315421913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157710959 + 157710960.

It is an arithmetic number, because the mean of its divisors is an integer number (157710960).

Almost surely, 2^315421919 is an apocalyptic number.

315421919 is a deficient number, since it is larger than the sum of its proper divisors (1).

315421919 is an equidigital number, since it uses as much as digits as its factorization.

315421919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9720, while the sum is 35.

The square root of 315421919 is about 17760.1215930522. The cubic root of 315421919 is about 680.7128618561.

The spelling of 315421919 in words is "three hundred fifteen million, four hundred twenty-one thousand, nine hundred nineteen".