15530565 has 16 divisors (see below), whose sum is σ = 25521408. Its totient is φ = 8058816.

The previous prime is 15530563. The next prime is 15530569. The reversal of 15530565 is 56503551.

It is not a de Polignac number, because 15530565 - 2¹ = 15530563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15530563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13437 + ... + 14546.

It is an arithmetic number, because the mean of its divisors is an integer number (1595088).

Almost surely, 2^15530565 is an apocalyptic number.

15530565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15530565 is a deficient number, since it is larger than the sum of its proper divisors (9990843).

15530565 is a wasteful number, since it uses less digits than its factorization.

15530565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28028.

The product of its (nonzero) digits is 11250, while the sum is 30.

The square root of 15530565 is about 3940.8837841276. The cubic root of 15530565 is about 249.4953285792.

The spelling of 15530565 in words is "fifteen million, five hundred thirty thousand, five hundred sixty-five".