8775422221 has 2 divisors, whose sum is σ = 8775422222. Its totient is φ = 8775422220.

The previous prime is 8775422191. The next prime is 8775422261. The reversal of 8775422221 is 1222245778.

It is an a-pointer prime, because the next prime (8775422261) can be obtained adding 8775422221 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7926340900 + 849081321 = 89030^2 + 29139^2 .

It is a cyclic number.

It is not a de Polignac number, because 8775422221 - 2¹⁵ = 8775389453 is a prime.

It is a nialpdrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8775422261) 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, 4387711110 + 4387711111.

It is an arithmetic number, because the mean of its divisors is an integer number (4387711111).

Almost surely, 2^8775422221 is an apocalyptic number.

It is an amenable number.

8775422221 is a deficient number, since it is larger than the sum of its proper divisors (1).

8775422221 is an equidigital number, since it uses as much as digits as its factorization.

8775422221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 125440, while the sum is 40.

The square root of 8775422221 is about 93677.2235978415. The cubic root of 8775422221 is about 2062.6363817303.

Adding to 8775422221 its reverse (1222245778), we get a palindrome (9997667999).

The spelling of 8775422221 in words is "eight billion, seven hundred seventy-five million, four hundred twenty-two thousand, two hundred twenty-one".