22222223 has 2 divisors, whose sum is σ = 22222224. Its totient is φ = 22222222.

The previous prime is 22222199. The next prime is 22222253. The reversal of 22222223 is 32222222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22222223 - 2¹² = 22218127 is a prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22222253) 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, 11111111 + 11111112.

It is an arithmetic number, because the mean of its divisors is an integer number (11111112).

Almost surely, 2^22222223 is an apocalyptic number.

22222223 is a deficient number, since it is larger than the sum of its proper divisors (1).

22222223 is an equidigital number, since it uses as much as digits as its factorization.

22222223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 384, while the sum is 17.

The square root of 22222223 is about 4714.0452904061. The cubic root of 22222223 is about 281.1442250473.

Adding to 22222223 its reverse (32222222), we get a palindrome (54444445).

Subtracting 22222223 from its reverse (32222222), we obtain a palindrome (9999999).

It can be divided in two parts, 2222222 and 3, that multiplied together give a palindrome (6666666).

The spelling of 22222223 in words is "twenty-two million, two hundred twenty-two thousand, two hundred twenty-three".