315891 has 6 divisors (see below), whose sum is σ = 456300. Its totient is φ = 210588.

The previous prime is 315883. The next prime is 315893. The reversal of 315891 is 198513.

It is not a de Polignac number, because 315891 - 2³ = 315883 is a prime.

315891 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 315891.

It is not an unprimeable number, because it can be changed into a prime (315893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17541 + ... + 17558.

It is an arithmetic number, because the mean of its divisors is an integer number (76050).

2³¹⁵⁸⁹¹ is an apocalyptic number.

315891 is a deficient number, since it is larger than the sum of its proper divisors (140409).

315891 is a wasteful number, since it uses less digits than its factorization.

315891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35105 (or 35102 counting only the distinct ones).

The product of its digits is 1080, while the sum is 27.

The square root of 315891 is about 562.0418133911. The cubic root of 315891 is about 68.1050136359.

It can be divided in two parts, 3158 and 91, that added together give a square (3249 = 57²).

The spelling of 315891 in words is "three hundred fifteen thousand, eight hundred ninety-one".