13225561 has 4 divisors (see below), whose sum is σ = 13652224. Its totient is φ = 12798900.

The previous prime is 13225549. The next prime is 13225573. The reversal of 13225561 is 16552231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (13225549) and next prime (13225573).

It is a cyclic number.

It is not a de Polignac number, because 13225561 - 2¹⁵ = 13192793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13225591) 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 3 ways as a sum of consecutive naturals, for example, 213285 + ... + 213346.

It is an arithmetic number, because the mean of its divisors is an integer number (3413056).

Almost surely, 2^13225561 is an apocalyptic number.

It is an amenable number.

13225561 is a deficient number, since it is larger than the sum of its proper divisors (426663).

13225561 is an equidigital number, since it uses as much as digits as its factorization.

13225561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426662.

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

The square root of 13225561 is about 3636.6964404525. The cubic root of 13225561 is about 236.4856000064.

Adding to 13225561 its reverse (16552231), we get a palindrome (29777792).

The spelling of 13225561 in words is "thirteen million, two hundred twenty-five thousand, five hundred sixty-one".