12224813 has 8 divisors (see below), whose sum is σ = 12433848. Its totient is φ = 12017664.

The previous prime is 12224791. The next prime is 12224831. The reversal of 12224813 is 31842221.

It is a happy number.

12224813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 100489 + 12124324 = 317^2 + 3482^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12224813 - 2⁶ = 12224749 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12224843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18395 + ... + 19047.

It is an arithmetic number, because the mean of its divisors is an integer number (1554231).

Almost surely, 2^12224813 is an apocalyptic number.

It is an amenable number.

12224813 is a deficient number, since it is larger than the sum of its proper divisors (209035).

12224813 is an equidigital number, since it uses as much as digits as its factorization.

12224813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 943.

The product of its digits is 768, while the sum is 23.

The square root of 12224813 is about 3496.4000057202. The cubic root of 12224813 is about 230.3637156423.

The spelling of 12224813 in words is "twelve million, two hundred twenty-four thousand, eight hundred thirteen".