82106881 has 2 divisors, whose sum is σ = 82106882. Its totient is φ = 82106880.

The previous prime is 82106873. The next prime is 82106891. The reversal of 82106881 is 18860128.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64256256 + 17850625 = 8016^2 + 4225^2 .

It is a cyclic number.

It is not a de Polignac number, because 82106881 - 2³ = 82106873 is a prime.

It is a super-2 number, since 2×82106881² = 13483079815096322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (82106831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41053440 + 41053441.

It is an arithmetic number, because the mean of its divisors is an integer number (41053441).

Almost surely, 2^82106881 is an apocalyptic number.

It is an amenable number.

82106881 is a deficient number, since it is larger than the sum of its proper divisors (1).

82106881 is an equidigital number, since it uses as much as digits as its factorization.

82106881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6144, while the sum is 34.

The square root of 82106881 is about 9061.2847323103. The cubic root of 82106881 is about 434.6368237501.

The spelling of 82106881 in words is "eighty-two million, one hundred six thousand, eight hundred eighty-one".