13224521 has 16 divisors (see below), whose sum is σ = 14572800. Its totient is φ = 11950848.

The previous prime is 13224499. The next prime is 13224539. The reversal of 13224521 is 12542231.

It is a cyclic number.

It is not a de Polignac number, because 13224521 - 2⁶ = 13224457 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13224493 and 13224502.

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

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 15 ways as a sum of consecutive naturals, for example, 57635 + ... + 57863.

It is an arithmetic number, because the mean of its divisors is an integer number (910800).

Almost surely, 2^13224521 is an apocalyptic number.

It is an amenable number.

13224521 is a deficient number, since it is larger than the sum of its proper divisors (1348279).

13224521 is a wasteful number, since it uses less digits than its factorization.

13224521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368.

The product of its digits is 480, while the sum is 20.

The square root of 13224521 is about 3636.5534507278. The cubic root of 13224521 is about 236.4794011145.

Adding to 13224521 its reverse (12542231), we get a palindrome (25766752).

The spelling of 13224521 in words is "thirteen million, two hundred twenty-four thousand, five hundred twenty-one".