82556081 has 2 divisors, whose sum is σ = 82556082. Its totient is φ = 82556080.

The previous prime is 82556009. The next prime is 82556093. The reversal of 82556081 is 18065528.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69889600 + 12666481 = 8360^2 + 3559^2 .

It is a cyclic number.

It is not a de Polignac number, because 82556081 - 2²⁶ = 15447217 is a prime.

It is a super-2 number, since 2×82556081² = 13631013020157122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (82556681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41278040 + 41278041.

It is an arithmetic number, because the mean of its divisors is an integer number (41278041).

Almost surely, 2^82556081 is an apocalyptic number.

It is an amenable number.

82556081 is a deficient number, since it is larger than the sum of its proper divisors (1).

82556081 is an equidigital number, since it uses as much as digits as its factorization.

82556081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19200, while the sum is 35.

The square root of 82556081 is about 9086.0376952773. The cubic root of 82556081 is about 435.4280034573.

The spelling of 82556081 in words is "eighty-two million, five hundred fifty-six thousand, eighty-one".