22118273 has 2 divisors, whose sum is σ = 22118274. Its totient is φ = 22118272.

The previous prime is 22118269. The next prime is 22118339. The reversal of 22118273 is 37281122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22118209 + 64 = 4703^2 + 8^2 .

It is a cyclic number.

It is not a de Polignac number, because 22118273 - 2² = 22118269 is a prime.

It is not a weakly prime, because it can be changed into another prime (22118233) 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, 11059136 + 11059137.

It is an arithmetic number, because the mean of its divisors is an integer number (11059137).

Almost surely, 2^22118273 is an apocalyptic number.

It is an amenable number.

22118273 is a deficient number, since it is larger than the sum of its proper divisors (1).

22118273 is an equidigital number, since it uses as much as digits as its factorization.

22118273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344, while the sum is 26.

The square root of 22118273 is about 4703.0068041626. The cubic root of 22118273 is about 280.7051656130.

Adding to 22118273 its reverse (37281122), we get a palindrome (59399395).

The spelling of 22118273 in words is "twenty-two million, one hundred eighteen thousand, two hundred seventy-three".