13226321 has 4 divisors (see below), whose sum is σ = 13281444. Its totient is φ = 13171200.

The previous prime is 13226303. The next prime is 13226329. The reversal of 13226321 is 12362231.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4752400 + 8473921 = 2180^2 + 2911^2 .

It is a cyclic number.

It is not a de Polignac number, because 13226321 - 2¹⁸ = 12964177 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13226293 and 13226302.

It is not an unprimeable number, because it can be changed into a prime (13226329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27200 + ... + 27681.

It is an arithmetic number, because the mean of its divisors is an integer number (3320361).

Almost surely, 2^13226321 is an apocalyptic number.

It is an amenable number.

13226321 is a deficient number, since it is larger than the sum of its proper divisors (55123).

13226321 is an equidigital number, since it uses as much as digits as its factorization.

13226321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55122.

The product of its digits is 432, while the sum is 20.

The square root of 13226321 is about 3636.8009293884. The cubic root of 13226321 is about 236.4901297604.

Adding to 13226321 its reverse (12362231), we get a palindrome (25588552).

The spelling of 13226321 in words is "thirteen million, two hundred twenty-six thousand, three hundred twenty-one".