22221233 has 2 divisors, whose sum is σ = 22221234. Its totient is φ = 22221232.

The previous prime is 22221211. The next prime is 22221247. The reversal of 22221233 is 33212222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20539024 + 1682209 = 4532^2 + 1297^2 .

It is a cyclic number.

It is not a de Polignac number, because 22221233 - 2¹⁴ = 22204849 is a prime.

It is not a weakly prime, because it can be changed into another prime (22221833) 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 as a sum of consecutive naturals, namely, 11110616 + 11110617.

It is an arithmetic number, because the mean of its divisors is an integer number (11110617).

Almost surely, 2^22221233 is an apocalyptic number.

It is an amenable number.

22221233 is a deficient number, since it is larger than the sum of its proper divisors (1).

22221233 is an equidigital number, since it uses as much as digits as its factorization.

22221233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 17.

The square root of 22221233 is about 4713.9402838814. The cubic root of 22221233 is about 281.1400499937.

Adding to 22221233 its reverse (33212222), we get a palindrome (55433455).

The spelling of 22221233 in words is "twenty-two million, two hundred twenty-one thousand, two hundred thirty-three".