13222191 has 4 divisors (see below), whose sum is σ = 17629592. Its totient is φ = 8814792.

The previous prime is 13222189. The next prime is 13222201. The reversal of 13222191 is 19122231.

13222191 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19122231 = 3 ⋅6374077.

It is not a de Polignac number, because 13222191 - 2¹ = 13222189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13222091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2203696 + ... + 2203701.

It is an arithmetic number, because the mean of its divisors is an integer number (4407398).

Almost surely, 2^13222191 is an apocalyptic number.

13222191 is a deficient number, since it is larger than the sum of its proper divisors (4407401).

13222191 is an equidigital number, since it uses as much as digits as its factorization.

13222191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4407400.

The product of its digits is 216, while the sum is 21.

The square root of 13222191 is about 3636.2330783381. The cubic root of 13222191 is about 236.4655120325.

The spelling of 13222191 in words is "thirteen million, two hundred twenty-two thousand, one hundred ninety-one".