15530065 has 4 divisors (see below), whose sum is σ = 18636084. Its totient is φ = 12424048.

The previous prime is 15530033. The next prime is 15530089. The reversal of 15530065 is 56003551.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12159169 + 3370896 = 3487^2 + 1836^2 .

It is a cyclic number.

It is not a de Polignac number, because 15530065 - 2⁵ = 15530033 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1553002 + ... + 1553011.

It is an arithmetic number, because the mean of its divisors is an integer number (4659021).

Almost surely, 2^15530065 is an apocalyptic number.

It is an amenable number.

15530065 is a deficient number, since it is larger than the sum of its proper divisors (3106019).

15530065 is an equidigital number, since it uses as much as digits as its factorization.

15530065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3106018.

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 15530065 is about 3940.8203460701. The cubic root of 15530065 is about 249.4926510848.

The spelling of 15530065 in words is "fifteen million, five hundred thirty thousand, sixty-five".