15191291 has 2 divisors, whose sum is σ = 15191292. Its totient is φ = 15191290.

The previous prime is 15191269. The next prime is 15191311. The reversal of 15191291 is 19219151.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15191291 is a prime.

It is not a weakly prime, because it can be changed into another prime (15191191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7595645 + 7595646.

It is an arithmetic number, because the mean of its divisors is an integer number (7595646).

Almost surely, 2^15191291 is an apocalyptic number.

15191291 is a deficient number, since it is larger than the sum of its proper divisors (1).

15191291 is an equidigital number, since it uses as much as digits as its factorization.

15191291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 810, while the sum is 29.

The square root of 15191291 is about 3897.6006722085. The cubic root of 15191291 is about 247.6651470660.

The spelling of 15191291 in words is "fifteen million, one hundred ninety-one thousand, two hundred ninety-one".