13115191 has 4 divisors (see below), whose sum is σ = 13299984. Its totient is φ = 12930400.

The previous prime is 13115173. The next prime is 13115197. The reversal of 13115191 is 19151131.

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 13115191 - 2⁹ = 13114679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13115197) 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, 92290 + ... + 92431.

It is an arithmetic number, because the mean of its divisors is an integer number (3324996).

Almost surely, 2^13115191 is an apocalyptic number.

13115191 is a deficient number, since it is larger than the sum of its proper divisors (184793).

13115191 is an equidigital number, since it uses as much as digits as its factorization.

13115191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184792.

The product of its digits is 135, while the sum is 22.

The square root of 13115191 is about 3621.4901629026. The cubic root of 13115191 is about 235.8259213737.

The spelling of 13115191 in words is "thirteen million, one hundred fifteen thousand, one hundred ninety-one".