315091 has 4 divisors (see below), whose sum is σ = 360112. Its totient is φ = 270072.

The previous prime is 315083. The next prime is 315097. The reversal of 315091 is 190513.

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 315091 - 2³ = 315083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (315097) 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 3 ways as a sum of consecutive naturals, for example, 22500 + ... + 22513.

It is an arithmetic number, because the mean of its divisors is an integer number (90028).

2³¹⁵⁰⁹¹ is an apocalyptic number.

315091 is a deficient number, since it is larger than the sum of its proper divisors (45021).

315091 is an equidigital number, since it uses as much as digits as its factorization.

315091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45020.

The product of its (nonzero) digits is 135, while the sum is 19.

The square root of 315091 is about 561.3296714053. The cubic root of 315091 is about 68.0474726174.

The spelling of 315091 in words is "three hundred fifteen thousand, ninety-one".