8221859 has 2 divisors, whose sum is σ = 8221860. Its totient is φ = 8221858.

The previous prime is 8221847. The next prime is 8221891. The reversal of 8221859 is 9581228.

8221859 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8221859 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8241859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4110929 + 4110930.

It is an arithmetic number, because the mean of its divisors is an integer number (4110930).

Almost surely, 2^8221859 is an apocalyptic number.

8221859 is a deficient number, since it is larger than the sum of its proper divisors (1).

8221859 is an equidigital number, since it uses as much as digits as its factorization.

8221859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 35.

The square root of 8221859 is about 2867.3784193929. The cubic root of 8221859 is about 201.8319927746.

The spelling of 8221859 in words is "eight million, two hundred twenty-one thousand, eight hundred fifty-nine".