8221573 has 2 divisors, whose sum is σ = 8221574. Its totient is φ = 8221572.

The previous prime is 8221567. The next prime is 8221579. The reversal of 8221573 is 3751228.

8221573 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (8221567) and next prime (8221579).

It can be written as a sum of positive squares in only one way, i.e., 4133089 + 4088484 = 2033^2 + 2022^2 .

It is a cyclic number.

It is not a de Polignac number, because 8221573 - 2⁹ = 8221061 is a prime.

8221573 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8221579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4110786 + 4110787.

It is an arithmetic number, because the mean of its divisors is an integer number (4110787).

Almost surely, 2^8221573 is an apocalyptic number.

It is an amenable number.

8221573 is a deficient number, since it is larger than the sum of its proper divisors (1).

8221573 is an equidigital number, since it uses as much as digits as its factorization.

8221573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3360, while the sum is 28.

The square root of 8221573 is about 2867.3285476206. The cubic root of 8221573 is about 201.8296524840.

The spelling of 8221573 in words is "eight million, two hundred twenty-one thousand, five hundred seventy-three".