13332221 has 8 divisors (see below), whose sum is σ = 15487104. Its totient is φ = 11239920.

The previous prime is 13332211. The next prime is 13332223. The reversal of 13332221 is 12223331.

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 13332221 - 2¹⁸ = 13070077 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13332221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13332223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15185 + ... + 16038.

It is an arithmetic number, because the mean of its divisors is an integer number (1935888).

Almost surely, 2^13332221 is an apocalyptic number.

It is an amenable number.

13332221 is a deficient number, since it is larger than the sum of its proper divisors (2154883).

13332221 is an equidigital number, since it uses as much as digits as its factorization.

13332221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31291.

The product of its digits is 216, while the sum is 17.

The square root of 13332221 is about 3651.3314010098. The cubic root of 13332221 is about 237.1196260310.

Adding to 13332221 its reverse (12223331), we get a palindrome (25555552).

The spelling of 13332221 in words is "thirteen million, three hundred thirty-two thousand, two hundred twenty-one".