22828217 has 2 divisors, whose sum is σ = 22828218. Its totient is φ = 22828216.

The previous prime is 22828207. The next prime is 22828219. The reversal of 22828217 is 71282822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20529961 + 2298256 = 4531^2 + 1516^2 .

It is a cyclic number.

It is not a de Polignac number, because 22828217 - 2⁶ = 22828153 is a prime.

It is a super-2 number, since 2×22828217² = 1042254982798178, which contains 22 as substring.

Together with 22828219, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22828219) 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, 11414108 + 11414109.

It is an arithmetic number, because the mean of its divisors is an integer number (11414109).

Almost surely, 2^22828217 is an apocalyptic number.

It is an amenable number.

22828217 is a deficient number, since it is larger than the sum of its proper divisors (1).

22828217 is an equidigital number, since it uses as much as digits as its factorization.

22828217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7168, while the sum is 32.

The square root of 22828217 is about 4777.8883410980. Note that the first 3 decimals coincide. The cubic root of 22828217 is about 283.6769163665.

The spelling of 22828217 in words is "twenty-two million, eight hundred twenty-eight thousand, two hundred seventeen".