22705223 has 2 divisors, whose sum is σ = 22705224. Its totient is φ = 22705222.

The previous prime is 22705219. The next prime is 22705261. The reversal of 22705223 is 32250722.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22705223 - 2² = 22705219 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22705213) 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, 11352611 + 11352612.

It is an arithmetic number, because the mean of its divisors is an integer number (11352612).

Almost surely, 2^22705223 is an apocalyptic number.

22705223 is a deficient number, since it is larger than the sum of its proper divisors (1).

22705223 is an equidigital number, since it uses as much as digits as its factorization.

22705223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 22705223 is about 4764.9997901364. Note that the first 3 decimals coincide. The cubic root of 22705223 is about 283.1665332725.

Adding to 22705223 its reverse (32250722), we get a palindrome (54955945).

The spelling of 22705223 in words is "twenty-two million, seven hundred five thousand, two hundred twenty-three".