82118851 has 2 divisors, whose sum is σ = 82118852. Its totient is φ = 82118850.

The previous prime is 82118849. The next prime is 82118899. The reversal of 82118851 is 15881128.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 82118851 - 2¹ = 82118849 is a prime.

Together with 82118849, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (82118831) 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, 41059425 + 41059426.

It is an arithmetic number, because the mean of its divisors is an integer number (41059426).

Almost surely, 2^82118851 is an apocalyptic number.

82118851 is a deficient number, since it is larger than the sum of its proper divisors (1).

82118851 is an equidigital number, since it uses as much as digits as its factorization.

82118851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5120, while the sum is 34.

The square root of 82118851 is about 9061.9452106046. The cubic root of 82118851 is about 434.6579439856.

Adding to 82118851 its reverse (15881128), we get a palindrome (97999979).

The spelling of 82118851 in words is "eighty-two million, one hundred eighteen thousand, eight hundred fifty-one".