191315 has 8 divisors (see below), whose sum is σ = 232848. Its totient is φ = 150880.

The previous prime is 191299. The next prime is 191339. The reversal of 191315 is 513191.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 191315 - 2⁴ = 191299 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 185 + ... + 645.

It is an arithmetic number, because the mean of its divisors is an integer number (29106).

2¹⁹¹³¹⁵ is an apocalyptic number.

191315 is a deficient number, since it is larger than the sum of its proper divisors (41533).

191315 is an equidigital number, since it uses as much as digits as its factorization.

191315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549.

The product of its digits is 135, while the sum is 20.

The square root of 191315 is about 437.3957018536. The cubic root of 191315 is about 57.6212940495.

The spelling of 191315 in words is "one hundred ninety-one thousand, three hundred fifteen".