315911 has 4 divisors (see below), whose sum is σ = 334512. Its totient is φ = 297312.

The previous prime is 315907. The next prime is 315937. The reversal of 315911 is 119513.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 315911 - 2² = 315907 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9275 + ... + 9308.

It is an arithmetic number, because the mean of its divisors is an integer number (83628).

2³¹⁵⁹¹¹ is an apocalyptic number.

315911 is a deficient number, since it is larger than the sum of its proper divisors (18601).

315911 is a wasteful number, since it uses less digits than its factorization.

315911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18600.

The product of its digits is 135, while the sum is 20.

The square root of 315911 is about 562.0596053801. The cubic root of 315911 is about 68.1064509160.

The spelling of 315911 in words is "three hundred fifteen thousand, nine hundred eleven".