82051384621 has 2 divisors, whose sum is σ = 82051384622. Its totient is φ = 82051384620.

The previous prime is 82051384589. The next prime is 82051384631. The reversal of 82051384621 is 12648315028.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57020664100 + 25030720521 = 238790^2 + 158211^2 .

It is a cyclic number.

It is not a de Polignac number, because 82051384621 - 2⁵ = 82051384589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82051384631) 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, 41025692310 + 41025692311.

It is an arithmetic number, because the mean of its divisors is an integer number (41025692311).

Almost surely, 2^82051384621 is an apocalyptic number.

It is an amenable number.

82051384621 is a deficient number, since it is larger than the sum of its proper divisors (1).

82051384621 is an equidigital number, since it uses as much as digits as its factorization.

82051384621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 92160, while the sum is 40.

Adding to 82051384621 its reverse (12648315028), we get a palindrome (94699699649).

The spelling of 82051384621 in words is "eighty-two billion, fifty-one million, three hundred eighty-four thousand, six hundred twenty-one".