82208681 has 2 divisors, whose sum is σ = 82208682. Its totient is φ = 82208680.

The previous prime is 82208669. The next prime is 82208689. The reversal of 82208681 is 18680228.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43033600 + 39175081 = 6560^2 + 6259^2 .

It is a cyclic number.

It is not a de Polignac number, because 82208681 - 2¹⁸ = 81946537 is a prime.

It is a super-2 number, since 2×82208681² = 13516534463519522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (82208689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41104340 + 41104341.

It is an arithmetic number, because the mean of its divisors is an integer number (41104341).

Almost surely, 2^82208681 is an apocalyptic number.

It is an amenable number.

82208681 is a deficient number, since it is larger than the sum of its proper divisors (1).

82208681 is an equidigital number, since it uses as much as digits as its factorization.

82208681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12288, while the sum is 35.

The square root of 82208681 is about 9066.9002972350. The cubic root of 82208681 is about 434.8163773376.

The spelling of 82208681 in words is "eighty-two million, two hundred eight thousand, six hundred eighty-one".