22225277 has 2 divisors, whose sum is σ = 22225278. Its totient is φ = 22225276.

The previous prime is 22225211. The next prime is 22225279. The reversal of 22225277 is 77252222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22221796 + 3481 = 4714^2 + 59^2 .

It is a cyclic number.

It is not a de Polignac number, because 22225277 - 2¹² = 22221181 is a prime.

Together with 22225279, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22225279) 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, 11112638 + 11112639.

It is an arithmetic number, because the mean of its divisors is an integer number (11112639).

Almost surely, 2^22225277 is an apocalyptic number.

It is an amenable number.

22225277 is a deficient number, since it is larger than the sum of its proper divisors (1).

22225277 is an equidigital number, since it uses as much as digits as its factorization.

22225277 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7840, while the sum is 29.

The square root of 22225277 is about 4714.3692048884. The cubic root of 22225277 is about 281.1571036738.

Adding to 22225277 its reverse (77252222), we get a palindrome (99477499).

The spelling of 22225277 in words is "twenty-two million, two hundred twenty-five thousand, two hundred seventy-seven".