85822081 has 2 divisors, whose sum is σ = 85822082. Its totient is φ = 85822080.

The previous prime is 85822073. The next prime is 85822091. The reversal of 85822081 is 18022858.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84345856 + 1476225 = 9184^2 + 1215^2 .

It is a cyclic number.

It is not a de Polignac number, because 85822081 - 2³ = 85822073 is a prime.

It is a super-2 number, since 2×85822081² = 14730859174341122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (85822021) 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, 42911040 + 42911041.

It is an arithmetic number, because the mean of its divisors is an integer number (42911041).

Almost surely, 2^85822081 is an apocalyptic number.

It is an amenable number.

85822081 is a deficient number, since it is larger than the sum of its proper divisors (1).

85822081 is an equidigital number, since it uses as much as digits as its factorization.

85822081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10240, while the sum is 34.

The square root of 85822081 is about 9264.0207793377. The cubic root of 85822081 is about 441.0958925441.

The spelling of 85822081 in words is "eighty-five million, eight hundred twenty-two thousand, eighty-one".