22402217 has 2 divisors, whose sum is σ = 22402218. Its totient is φ = 22402216.

The previous prime is 22402169. The next prime is 22402223. The reversal of 22402217 is 71220422.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21353641 + 1048576 = 4621^2 + 1024^2 .

It is a cyclic number.

It is not a de Polignac number, because 22402217 - 2¹⁰ = 22401193 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22401217) 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, 11201108 + 11201109.

It is an arithmetic number, because the mean of its divisors is an integer number (11201109).

Almost surely, 2^22402217 is an apocalyptic number.

It is an amenable number.

22402217 is a deficient number, since it is larger than the sum of its proper divisors (1).

22402217 is an equidigital number, since it uses as much as digits as its factorization.

22402217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 22402217 is about 4733.0980340576. The cubic root of 22402217 is about 281.9012488932.

Adding to 22402217 its reverse (71220422), we get a palindrome (93622639).

The spelling of 22402217 in words is "twenty-two million, four hundred two thousand, two hundred seventeen".