82220717 has 2 divisors, whose sum is σ = 82220718. Its totient is φ = 82220716.

The previous prime is 82220707. The next prime is 82220737. The reversal of 82220717 is 71702228.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82065481 + 155236 = 9059^2 + 394^2 .

It is a cyclic number.

It is not a de Polignac number, because 82220717 - 2⁸ = 82220461 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 82220717.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82220707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41110358 + 41110359.

It is an arithmetic number, because the mean of its divisors is an integer number (41110359).

Almost surely, 2^82220717 is an apocalyptic number.

It is an amenable number.

82220717 is a deficient number, since it is larger than the sum of its proper divisors (1).

82220717 is an equidigital number, since it uses as much as digits as its factorization.

82220717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 82220717 is about 9067.5640058397. The cubic root of 82220717 is about 434.8375964857.

The spelling of 82220717 in words is "eighty-two million, two hundred twenty thousand, seven hundred seventeen".