13221313 has 4 divisors (see below), whose sum is σ = 15110080. Its totient is φ = 11332548.

The previous prime is 13221293. The next prime is 13221317. The reversal of 13221313 is 31312231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13221313 - 2¹³ = 13213121 is a prime.

It is a super-3 number, since 3×13221313³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13221317) 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 3 ways as a sum of consecutive naturals, for example, 944373 + ... + 944386.

It is an arithmetic number, because the mean of its divisors is an integer number (3777520).

Almost surely, 2^13221313 is an apocalyptic number.

It is an amenable number.

13221313 is a deficient number, since it is larger than the sum of its proper divisors (1888767).

13221313 is an equidigital number, since it uses as much as digits as its factorization.

13221313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1888766.

The product of its digits is 108, while the sum is 16.

The square root of 13221313 is about 3636.1123469992. The cubic root of 13221313 is about 236.4602778694.

Adding to 13221313 its reverse (31312231), we get a palindrome (44533544).

The spelling of 13221313 in words is "thirteen million, two hundred twenty-one thousand, three hundred thirteen".