82166243 has 2 divisors, whose sum is σ = 82166244. Its totient is φ = 82166242.

The previous prime is 82166237. The next prime is 82166257. The reversal of 82166243 is 34266128.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 82166243 - 2⁶ = 82166179 is a prime.

It is not a weakly prime, because it can be changed into another prime (82166443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41083121 + 41083122.

It is an arithmetic number, because the mean of its divisors is an integer number (41083122).

Almost surely, 2^82166243 is an apocalyptic number.

82166243 is a deficient number, since it is larger than the sum of its proper divisors (1).

82166243 is an equidigital number, since it uses as much as digits as its factorization.

82166243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 32.

The square root of 82166243 is about 9064.5597245536. The cubic root of 82166243 is about 434.7415437420.

The spelling of 82166243 in words is "eighty-two million, one hundred sixty-six thousand, two hundred forty-three".