13224421 has 8 divisors (see below), whose sum is σ = 15284160. Its totient is φ = 11207328.

The previous prime is 13224391. The next prime is 13224457. The reversal of 13224421 is 12442231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13224421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13224221) 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 7 ways as a sum of consecutive naturals, for example, 9991 + ... + 11236.

It is an arithmetic number, because the mean of its divisors is an integer number (1910520).

Almost surely, 2^13224421 is an apocalyptic number.

It is an amenable number.

13224421 is a deficient number, since it is larger than the sum of its proper divisors (2059739).

13224421 is an equidigital number, since it uses as much as digits as its factorization.

13224421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21323.

The product of its digits is 384, while the sum is 19.

The square root of 13224421 is about 3636.5397014195. The cubic root of 13224421 is about 236.4788050501.

Adding to 13224421 its reverse (12442231), we get a palindrome (25666652).

The spelling of 13224421 in words is "thirteen million, two hundred twenty-four thousand, four hundred twenty-one".