13000221 has 24 divisors (see below), whose sum is σ = 21106176. Its totient is φ = 7650720.

The previous prime is 13000219. The next prime is 13000243. The reversal of 13000221 is 12200031.

It is a happy number.

13000221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13000221 - 2¹ = 13000219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13000201) 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 23 ways as a sum of consecutive naturals, for example, 276 + ... + 5106.

It is an arithmetic number, because the mean of its divisors is an integer number (879424).

Almost surely, 2^13000221 is an apocalyptic number.

It is an amenable number.

13000221 is a deficient number, since it is larger than the sum of its proper divisors (8105955).

13000221 is a wasteful number, since it uses less digits than its factorization.

13000221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4873 (or 4870 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 13000221 is about 3605.5819225196. The cubic root of 13000221 is about 235.1348011875.

Adding to 13000221 its reverse (12200031), we get a palindrome (25200252).

The spelling of 13000221 in words is "thirteen million, two hundred twenty-one", and thus it is an aban number.