15172291 has 2 divisors, whose sum is σ = 15172292. Its totient is φ = 15172290.

The previous prime is 15172277. The next prime is 15172301. The reversal of 15172291 is 19227151.

15172291 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15172291 - 2⁵ = 15172259 is a prime.

It is not a weakly prime, because it can be changed into another prime (15172231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7586145 + 7586146.

It is an arithmetic number, because the mean of its divisors is an integer number (7586146).

Almost surely, 2^15172291 is an apocalyptic number.

15172291 is a deficient number, since it is larger than the sum of its proper divisors (1).

15172291 is an equidigital number, since it uses as much as digits as its factorization.

15172291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1260, while the sum is 28.

The square root of 15172291 is about 3895.1625126559. The cubic root of 15172291 is about 247.5618510182.

The spelling of 15172291 in words is "fifteen million, one hundred seventy-two thousand, two hundred ninety-one".