315135091 has 4 divisors (see below), whose sum is σ = 315190552. Its totient is φ = 315079632.

The previous prime is 315135077. The next prime is 315135109. The reversal of 315135091 is 190531513.

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 315135091 - 2²⁵ = 281580659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (315135991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18090 + ... + 30943.

It is an arithmetic number, because the mean of its divisors is an integer number (78797638).

Almost surely, 2^315135091 is an apocalyptic number.

315135091 is a deficient number, since it is larger than the sum of its proper divisors (55461).

315135091 is an equidigital number, since it uses as much as digits as its factorization.

315135091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55460.

The product of its (nonzero) digits is 2025, while the sum is 28.

The square root of 315135091 is about 17752.0446991325. The cubic root of 315135091 is about 680.5064645308.

The spelling of 315135091 in words is "three hundred fifteen million, one hundred thirty-five thousand, ninety-one".