82885181 has 2 divisors, whose sum is σ = 82885182. Its totient is φ = 82885180.

The previous prime is 82885177. The next prime is 82885193. The reversal of 82885181 is 18158828.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44009956 + 38875225 = 6634^2 + 6235^2 .

It is a cyclic number.

It is not a de Polignac number, because 82885181 - 2² = 82885177 is a prime.

It is a super-2 number, since 2×82885181² = 13739906458805522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82885981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41442590 + 41442591.

It is an arithmetic number, because the mean of its divisors is an integer number (41442591).

Almost surely, 2^82885181 is an apocalyptic number.

It is an amenable number.

82885181 is a deficient number, since it is larger than the sum of its proper divisors (1).

82885181 is an equidigital number, since it uses as much as digits as its factorization.

82885181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40960, while the sum is 41.

The square root of 82885181 is about 9104.1298870348. The cubic root of 82885181 is about 436.0058303095.

The spelling of 82885181 in words is "eighty-two million, eight hundred eighty-five thousand, one hundred eighty-one".