15188561 has 2 divisors, whose sum is σ = 15188562. Its totient is φ = 15188560.

The previous prime is 15188539. The next prime is 15188587. The reversal of 15188561 is 16588151.

15188561 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., 9985600 + 5202961 = 3160^2 + 2281^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15188561 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (15188501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7594280 + 7594281.

It is an arithmetic number, because the mean of its divisors is an integer number (7594281).

Almost surely, 2^15188561 is an apocalyptic number.

It is an amenable number.

15188561 is a deficient number, since it is larger than the sum of its proper divisors (1).

15188561 is an equidigital number, since it uses as much as digits as its factorization.

15188561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9600, while the sum is 35.

The square root of 15188561 is about 3897.2504410161. The cubic root of 15188561 is about 247.6503103555.

The spelling of 15188561 in words is "fifteen million, one hundred eighty-eight thousand, five hundred sixty-one".