13607221 has 8 divisors (see below), whose sum is σ = 14122944. Its totient is φ = 13100640.

The previous prime is 13607219. The next prime is 13607239. The reversal of 13607221 is 12270631.

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 13607221 - 2¹ = 13607219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13607192 and 13607201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13607201) 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, 825 + ... + 5281.

It is an arithmetic number, because the mean of its divisors is an integer number (1765368).

Almost surely, 2^13607221 is an apocalyptic number.

It is an amenable number.

13607221 is a deficient number, since it is larger than the sum of its proper divisors (515723).

13607221 is an equidigital number, since it uses as much as digits as its factorization.

13607221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4571.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 13607221 is about 3688.7966872681. The cubic root of 13607221 is about 238.7388767055.

Adding to 13607221 its reverse (12270631), we get a palindrome (25877852).

The spelling of 13607221 in words is "thirteen million, six hundred seven thousand, two hundred twenty-one".