82564219 has 2 divisors, whose sum is σ = 82564220. Its totient is φ = 82564218.

The previous prime is 82564211. The next prime is 82564271. The reversal of 82564219 is 91246528.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 82564219 - 2³ = 82564211 is a prime.

It is a super-2 number, since 2×82564219² = 13633700518159922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (82564211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41282109 + 41282110.

It is an arithmetic number, because the mean of its divisors is an integer number (41282110).

Almost surely, 2^82564219 is an apocalyptic number.

82564219 is a deficient number, since it is larger than the sum of its proper divisors (1).

82564219 is an equidigital number, since it uses as much as digits as its factorization.

82564219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 37.

The square root of 82564219 is about 9086.4855142129. The cubic root of 82564219 is about 435.4423104860.

The spelling of 82564219 in words is "eighty-two million, five hundred sixty-four thousand, two hundred nineteen".