13544221 has 4 divisors (see below), whose sum is σ = 13647744. Its totient is φ = 13440700.

The previous prime is 13544197. The next prime is 13544243. The reversal of 13544221 is 12244531.

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 a cyclic number.

It is not a de Polignac number, because 13544221 - 2¹⁵ = 13511453 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13544192 and 13544201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13544261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51565 + ... + 51826.

It is an arithmetic number, because the mean of its divisors is an integer number (3411936).

Almost surely, 2^13544221 is an apocalyptic number.

It is an amenable number.

13544221 is a deficient number, since it is larger than the sum of its proper divisors (103523).

13544221 is a wasteful number, since it uses less digits than its factorization.

13544221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103522.

The product of its digits is 960, while the sum is 22.

The square root of 13544221 is about 3680.2474101614. The cubic root of 13544221 is about 238.3698613331.

Adding to 13544221 its reverse (12244531), we get a palindrome (25788752).

The spelling of 13544221 in words is "thirteen million, five hundred forty-four thousand, two hundred twenty-one".