22228279 has 2 divisors, whose sum is σ = 22228280. Its totient is φ = 22228278.

The previous prime is 22228249. The next prime is 22228289. The reversal of 22228279 is 97282222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22228279 - 2⁵ = 22228247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22228249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11114139 + 11114140.

It is an arithmetic number, because the mean of its divisors is an integer number (11114140).

Almost surely, 2^22228279 is an apocalyptic number.

22228279 is a deficient number, since it is larger than the sum of its proper divisors (1).

22228279 is an equidigital number, since it uses as much as digits as its factorization.

22228279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 34.

The square root of 22228279 is about 4714.6875824385. The cubic root of 22228279 is about 281.1697618682.

It can be divided in two parts, 2222 and 8279, that added together give a palindrome (10501).

The spelling of 22228279 in words is "twenty-two million, two hundred twenty-eight thousand, two hundred seventy-nine".