13321165 has 32 divisors (see below), whose sum is σ = 19418112. Its totient is φ = 8640000.

The previous prime is 13321151. The next prime is 13321169. The reversal of 13321165 is 56112331.

It is a happy number.

It is not a de Polignac number, because 13321165 - 2¹⁵ = 13288397 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13321169) 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 31 ways as a sum of consecutive naturals, for example, 21865 + ... + 22465.

It is an arithmetic number, because the mean of its divisors is an integer number (606816).

Almost surely, 2^13321165 is an apocalyptic number.

It is an amenable number.

13321165 is a deficient number, since it is larger than the sum of its proper divisors (6096947).

13321165 is a wasteful number, since it uses less digits than its factorization.

13321165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661.

The product of its digits is 540, while the sum is 22.

The square root of 13321165 is about 3649.8171187061. The cubic root of 13321165 is about 237.0540625716.

Adding to 13321165 its reverse (56112331), we get a palindrome (69433496).

The spelling of 13321165 in words is "thirteen million, three hundred twenty-one thousand, one hundred sixty-five".