22223813 has 2 divisors, whose sum is σ = 22223814. Its totient is φ = 22223812.

The previous prime is 22223779. The next prime is 22223837. The reversal of 22223813 is 31832222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21836929 + 386884 = 4673^2 + 622^2 .

It is a cyclic number.

It is not a de Polignac number, because 22223813 - 2⁸ = 22223557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22223413) 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 as a sum of consecutive naturals, namely, 11111906 + 11111907.

It is an arithmetic number, because the mean of its divisors is an integer number (11111907).

Almost surely, 2^22223813 is an apocalyptic number.

It is an amenable number.

22223813 is a deficient number, since it is larger than the sum of its proper divisors (1).

22223813 is an equidigital number, since it uses as much as digits as its factorization.

22223813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 23.

The square root of 22223813 is about 4714.2139323539. The cubic root of 22223813 is about 281.1509301769.

The spelling of 22223813 in words is "twenty-two million, two hundred twenty-three thousand, eight hundred thirteen".