13075221 has 4 divisors (see below), whose sum is σ = 17433632. Its totient is φ = 8716812.

The previous prime is 13075207. The next prime is 13075243. The reversal of 13075221 is 12257031.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12257031 = 3 ⋅4085677.

It is not a de Polignac number, because 13075221 - 2⁵ = 13075189 is a prime.

It is a super-2 number, since 2×13075221² = 341922808397682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13075291) 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, 2179201 + ... + 2179206.

It is an arithmetic number, because the mean of its divisors is an integer number (4358408).

Almost surely, 2^13075221 is an apocalyptic number.

It is an amenable number.

13075221 is a deficient number, since it is larger than the sum of its proper divisors (4358411).

13075221 is an equidigital number, since it uses as much as digits as its factorization.

13075221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4358410.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 13075221 is about 3615.9675053850. The cubic root of 13075221 is about 235.5861090350.

The spelling of 13075221 in words is "thirteen million, seventy-five thousand, two hundred twenty-one".