15238591 has 2 divisors, whose sum is σ = 15238592. Its totient is φ = 15238590.

The previous prime is 15238529. The next prime is 15238609. The reversal of 15238591 is 19583251.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15238591 - 2⁷ = 15238463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15238501) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7619295 + 7619296.

It is an arithmetic number, because the mean of its divisors is an integer number (7619296).

Almost surely, 2^15238591 is an apocalyptic number.

15238591 is a deficient number, since it is larger than the sum of its proper divisors (1).

15238591 is an equidigital number, since it uses as much as digits as its factorization.

15238591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800, while the sum is 34.

The square root of 15238591 is about 3903.6637918755. The cubic root of 15238591 is about 247.9219262998.

The spelling of 15238591 in words is "fifteen million, two hundred thirty-eight thousand, five hundred ninety-one".