13165225 has 12 divisors (see below), whose sum is σ = 17285724. Its totient is φ = 9912320.

The previous prime is 13165213. The next prime is 13165241. The reversal of 13165225 is 52256131.

It can be written as a sum of positive squares in 6 ways, for example, as 1929321 + 11235904 = 1389^2 + 3352^2 .

It is not a de Polignac number, because 13165225 - 2¹¹ = 13163177 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13165225.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15064 + ... + 15913.

It is an arithmetic number, because the mean of its divisors is an integer number (1440477).

Almost surely, 2^13165225 is an apocalyptic number.

It is an amenable number.

13165225 is a deficient number, since it is larger than the sum of its proper divisors (4120499).

13165225 is a wasteful number, since it uses less digits than its factorization.

13165225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31004 (or 30999 counting only the distinct ones).

The product of its digits is 1800, while the sum is 25.

The square root of 13165225 is about 3628.3915169121. The cubic root of 13165225 is about 236.1254300684.

It can be divided in two parts, 131 and 65225, that added together give a palindrome (65356).

The spelling of 13165225 in words is "thirteen million, one hundred sixty-five thousand, two hundred twenty-five".