22288223 has 2 divisors, whose sum is σ = 22288224. Its totient is φ = 22288222.

The previous prime is 22288213. The next prime is 22288229. The reversal of 22288223 is 32288222.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22288223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22288229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11144111 + 11144112.

It is an arithmetic number, because the mean of its divisors is an integer number (11144112).

Almost surely, 2^22288223 is an apocalyptic number.

22288223 is a deficient number, since it is larger than the sum of its proper divisors (1).

22288223 is an equidigital number, since it uses as much as digits as its factorization.

22288223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6144, while the sum is 29.

The square root of 22288223 is about 4721.0404573568. The cubic root of 22288223 is about 281.4222827246.

Subtracting 22288223 from its reverse (32288222), we obtain a palindrome (9999999).

The spelling of 22288223 in words is "twenty-two million, two hundred eighty-eight thousand, two hundred twenty-three".