15328861 has 2 divisors, whose sum is σ = 15328862. Its totient is φ = 15328860.

The previous prime is 15328853. The next prime is 15328867. The reversal of 15328861 is 16882351.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13003236 + 2325625 = 3606^2 + 1525^2 .

It is an emirp because it is prime and its reverse (16882351) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15328861 - 2³ = 15328853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15328867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7664430 + 7664431.

It is an arithmetic number, because the mean of its divisors is an integer number (7664431).

Almost surely, 2^15328861 is an apocalyptic number.

It is an amenable number.

15328861 is a deficient number, since it is larger than the sum of its proper divisors (1).

15328861 is an equidigital number, since it uses as much as digits as its factorization.

15328861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 34.

The square root of 15328861 is about 3915.2089343993. The cubic root of 15328861 is about 248.4105074718.

The spelling of 15328861 in words is "fifteen million, three hundred twenty-eight thousand, eight hundred sixty-one".