315871 has 4 divisors (see below), whose sum is σ = 320272. Its totient is φ = 311472.

The previous prime is 315857. The next prime is 315881. The reversal of 315871 is 178513.

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 315871 - 2⁷ = 315743 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 (315811) 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, 2091 + ... + 2236.

It is an arithmetic number, because the mean of its divisors is an integer number (80068).

2³¹⁵⁸⁷¹ is an apocalyptic number.

315871 is a deficient number, since it is larger than the sum of its proper divisors (4401).

315871 is an equidigital number, since it uses as much as digits as its factorization.

315871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4400.

The product of its digits is 840, while the sum is 25.

The square root of 315871 is about 562.0240208390. The cubic root of 315871 is about 68.1035762952.

The spelling of 315871 in words is "three hundred fifteen thousand, eight hundred seventy-one".