315278911 has 2 divisors, whose sum is σ = 315278912. Its totient is φ = 315278910.

The previous prime is 315278863. The next prime is 315278921. The reversal of 315278911 is 119872513.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 315278911 - 2⁷ = 315278783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315278921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157639455 + 157639456.

It is an arithmetic number, because the mean of its divisors is an integer number (157639456).

Almost surely, 2^315278911 is an apocalyptic number.

315278911 is a deficient number, since it is larger than the sum of its proper divisors (1).

315278911 is an equidigital number, since it uses as much as digits as its factorization.

315278911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 37.

The square root of 315278911 is about 17756.0950380426. The cubic root of 315278911 is about 680.6099709928.

The spelling of 315278911 in words is "three hundred fifteen million, two hundred seventy-eight thousand, nine hundred eleven".