13224279 has 4 divisors (see below), whose sum is σ = 17632376. Its totient is φ = 8816184.

The previous prime is 13224271. The next prime is 13224313. The reversal of 13224279 is 97242231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97242231 = 3 ⋅32414077.

It is not a de Polignac number, because 13224279 - 2³ = 13224271 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 (13224271) 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, 2204044 + ... + 2204049.

It is an arithmetic number, because the mean of its divisors is an integer number (4408094).

Almost surely, 2^13224279 is an apocalyptic number.

13224279 is a deficient number, since it is larger than the sum of its proper divisors (4408097).

13224279 is an equidigital number, since it uses as much as digits as its factorization.

13224279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4408096.

The product of its digits is 6048, while the sum is 30.

The square root of 13224279 is about 3636.5201773124. The cubic root of 13224279 is about 236.4779586334.

The spelling of 13224279 in words is "thirteen million, two hundred twenty-four thousand, two hundred seventy-nine".