82180841 has 2 divisors, whose sum is σ = 82180842. Its totient is φ = 82180840.

The previous prime is 82180837. The next prime is 82180849. The reversal of 82180841 is 14808128.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47665216 + 34515625 = 6904^2 + 5875^2 .

It is a cyclic number.

It is not a de Polignac number, because 82180841 - 2² = 82180837 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 82180798 and 82180807.

It is not a weakly prime, because it can be changed into another prime (82180849) 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, 41090420 + 41090421.

It is an arithmetic number, because the mean of its divisors is an integer number (41090421).

Almost surely, 2^82180841 is an apocalyptic number.

It is an amenable number.

82180841 is a deficient number, since it is larger than the sum of its proper divisors (1).

82180841 is an equidigital number, since it uses as much as digits as its factorization.

82180841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4096, while the sum is 32.

The square root of 82180841 is about 9065.3649126773. The cubic root of 82180841 is about 434.7672882206.

Adding to 82180841 its reverse (14808128), we get a palindrome (96988969).

The spelling of 82180841 in words is "eighty-two million, one hundred eighty thousand, eight hundred forty-one".