82818481 has 2 divisors, whose sum is σ = 82818482. Its totient is φ = 82818480.

The previous prime is 82818457. The next prime is 82818487. The reversal of 82818481 is 18481828.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78854400 + 3964081 = 8880^2 + 1991^2 .

It is a cyclic number.

It is not a de Polignac number, because 82818481 - 2⁷ = 82818353 is a prime.

It is a super-2 number, since 2×82818481² = 13717801590294722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (82818487) 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, 41409240 + 41409241.

It is an arithmetic number, because the mean of its divisors is an integer number (41409241).

Almost surely, 2^82818481 is an apocalyptic number.

It is an amenable number.

82818481 is a deficient number, since it is larger than the sum of its proper divisors (1).

82818481 is an equidigital number, since it uses as much as digits as its factorization.

82818481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32768, while the sum is 40.

The square root of 82818481 is about 9100.4659770805. The cubic root of 82818481 is about 435.8888436019. Note that the first 4 decimals are identical.

The spelling of 82818481 in words is "eighty-two million, eight hundred eighteen thousand, four hundred eighty-one".