13303221 has 8 divisors (see below), whose sum is σ = 17792544. Its totient is φ = 8841360.

The previous prime is 13303219. The next prime is 13303237. The reversal of 13303221 is 12230331.

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

It is not a de Polignac number, because 13303221 - 2¹ = 13303219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13303221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13303271) 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, 5706 + ... + 7691.

It is an arithmetic number, because the mean of its divisors is an integer number (2224068).

Almost surely, 2^13303221 is an apocalyptic number.

It is an amenable number.

13303221 is a deficient number, since it is larger than the sum of its proper divisors (4489323).

13303221 is a wasteful number, since it uses less digits than its factorization.

13303221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13731.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 13303221 is about 3647.3580849705. The cubic root of 13303221 is about 236.9475751515.

Adding to 13303221 its reverse (12230331), we get a palindrome (25533552).

The spelling of 13303221 in words is "thirteen million, three hundred three thousand, two hundred twenty-one".