15115589 has 2 divisors, whose sum is σ = 15115590. Its totient is φ = 15115588.

The previous prime is 15115579. The next prime is 15115627. The reversal of 15115589 is 98551151.

15115589 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14002564 + 1113025 = 3742^2 + 1055^2 .

It is a cyclic number.

It is not a de Polignac number, because 15115589 - 2⁸ = 15115333 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15115579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7557794 + 7557795.

It is an arithmetic number, because the mean of its divisors is an integer number (7557795).

Almost surely, 2^15115589 is an apocalyptic number.

It is an amenable number.

15115589 is a deficient number, since it is larger than the sum of its proper divisors (1).

15115589 is an equidigital number, since it uses as much as digits as its factorization.

15115589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9000, while the sum is 35.

The square root of 15115589 is about 3887.8771842742. The cubic root of 15115589 is about 247.2530693674.

The spelling of 15115589 in words is "fifteen million, one hundred fifteen thousand, five hundred eighty-nine".