13224561 has 12 divisors (see below), whose sum is σ = 20511792. Its totient is φ = 7556808.

The previous prime is 13224559. The next prime is 13224571. The reversal of 13224561 is 16542231.

13224561 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13224561 - 2¹ = 13224559 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13224571) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44835 + ... + 45128.

It is an arithmetic number, because the mean of its divisors is an integer number (1709316).

Almost surely, 2^13224561 is an apocalyptic number.

It is an amenable number.

13224561 is a deficient number, since it is larger than the sum of its proper divisors (7287231).

13224561 is an equidigital number, since it uses as much as digits as its factorization.

13224561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89980 (or 89973 counting only the distinct ones).

The product of its digits is 1440, while the sum is 24.

The square root of 13224561 is about 3636.5589504365. The cubic root of 13224561 is about 236.4796395394.

Adding to 13224561 its reverse (16542231), we get a palindrome (29766792).

The spelling of 13224561 in words is "thirteen million, two hundred twenty-four thousand, five hundred sixty-one".