315079081 has 2 divisors, whose sum is σ = 315079082. Its totient is φ = 315079080.

The previous prime is 315079073. The next prime is 315079129. The reversal of 315079081 is 180970513.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 225000000 + 90079081 = 15000^2 + 9491^2 .

It is an emirp because it is prime and its reverse (180970513) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 315079081 - 2³ = 315079073 is a prime.

It is a super-2 number, since 2×315079081² = 198549654567609122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (315079021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157539540 + 157539541.

It is an arithmetic number, because the mean of its divisors is an integer number (157539541).

Almost surely, 2^315079081 is an apocalyptic number.

It is an amenable number.

315079081 is a deficient number, since it is larger than the sum of its proper divisors (1).

315079081 is an equidigital number, since it uses as much as digits as its factorization.

315079081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 34.

The square root of 315079081 is about 17750.4670642775. The cubic root of 315079081 is about 680.4661459220.

The spelling of 315079081 in words is "three hundred fifteen million, seventy-nine thousand, eighty-one".