13305565 has 16 divisors (see below), whose sum is σ = 19651968. Its totient is φ = 8421696.

The previous prime is 13305563. The next prime is 13305583. The reversal of 13305565 is 56550331.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 13305565 - 2¹ = 13305563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13305563) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 14167 + ... + 15076.

It is an arithmetic number, because the mean of its divisors is an integer number (1228248).

Almost surely, 2^13305565 is an apocalyptic number.

It is an amenable number.

13305565 is a deficient number, since it is larger than the sum of its proper divisors (6346403).

13305565 is a wasteful number, since it uses less digits than its factorization.

13305565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29268.

The product of its (nonzero) digits is 6750, while the sum is 28.

The square root of 13305565 is about 3647.6793992894. The cubic root of 13305565 is about 236.9614908916.

Adding to 13305565 its reverse (56550331), we get a palindrome (69855896).

The spelling of 13305565 in words is "thirteen million, three hundred five thousand, five hundred sixty-five".