13202221 has 8 divisors (see below), whose sum is σ = 13721400. Its totient is φ = 12687360.

The previous prime is 13202219. The next prime is 13202227. The reversal of 13202221 is 12220231.

13202221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3348900 + 9853321 = 1830^2 + 3139^2 .

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 13202221 - 2¹ = 13202219 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 (13202227) 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, 6045 + ... + 7933.

It is an arithmetic number, because the mean of its divisors is an integer number (1715175).

Almost surely, 2^13202221 is an apocalyptic number.

It is an amenable number.

13202221 is a deficient number, since it is larger than the sum of its proper divisors (519179).

13202221 is a wasteful number, since it uses less digits than its factorization.

13202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2159.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 13202221 is about 3633.4860671262. The cubic root of 13202221 is about 236.3464042978.

Adding to 13202221 its reverse (12220231), we get a palindrome (25422452).

The spelling of 13202221 in words is "thirteen million, two hundred two thousand, two hundred twenty-one".