13005221 has 8 divisors (see below), whose sum is σ = 14091264. Its totient is φ = 11954880.

The previous prime is 13005211. The next prime is 13005227. The reversal of 13005221 is 12250031.

It is a happy number.

13005221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 13005221 - 2¹⁰ = 13004197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13005196 and 13005205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13005227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8165 + ... + 9626.

It is an arithmetic number, because the mean of its divisors is an integer number (1761408).

Almost surely, 2^13005221 is an apocalyptic number.

It is an amenable number.

13005221 is a deficient number, since it is larger than the sum of its proper divisors (1086043).

13005221 is a wasteful number, since it uses less digits than its factorization.

13005221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17851.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 13005221 is about 3606.2752252151. The cubic root of 13005221 is about 235.1649422985.

Adding to 13005221 its reverse (12250031), we get a palindrome (25255252).

The spelling of 13005221 in words is "thirteen million, five thousand, two hundred twenty-one".