315971 has 4 divisors (see below), whose sum is σ = 319032. Its totient is φ = 312912.

The previous prime is 315967. The next prime is 315977. The reversal of 315971 is 179513.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 179513 = 89 ⋅2017.

It is a cyclic number.

It is not a de Polignac number, because 315971 - 2² = 315967 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 315971.

It is not an unprimeable number, because it can be changed into a prime (315977) 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, 1370 + ... + 1583.

It is an arithmetic number, because the mean of its divisors is an integer number (79758).

2³¹⁵⁹⁷¹ is an apocalyptic number.

315971 is a deficient number, since it is larger than the sum of its proper divisors (3061).

315971 is a wasteful number, since it uses less digits than its factorization.

315971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3060.

The product of its digits is 945, while the sum is 26.

The square root of 315971 is about 562.1129779680. The cubic root of 315971 is about 68.1107623923.

The spelling of 315971 in words is "three hundred fifteen thousand, nine hundred seventy-one".