8221579 has 2 divisors, whose sum is σ = 8221580. Its totient is φ = 8221578.

The previous prime is 8221573. The next prime is 8221583. The reversal of 8221579 is 9751228.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8221579 - 2²¹ = 6124427 is a prime.

It is a super-2 number, since 2×8221579² = 135188722506482, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8221573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4110789 + 4110790.

It is an arithmetic number, because the mean of its divisors is an integer number (4110790).

Almost surely, 2^8221579 is an apocalyptic number.

8221579 is a deficient number, since it is larger than the sum of its proper divisors (1).

8221579 is an equidigital number, since it uses as much as digits as its factorization.

8221579 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 34.

The square root of 8221579 is about 2867.3295938905. The cubic root of 8221579 is about 201.8297015815.

It can be divided in two parts, 822 and 1579, that added together give a 4-th power (2401 = 7⁴).

The spelling of 8221579 in words is "eight million, two hundred twenty-one thousand, five hundred seventy-nine".