82221663443 has 2 divisors, whose sum is σ = 82221663444. Its totient is φ = 82221663442.

The previous prime is 82221663397. The next prime is 82221663451. The reversal of 82221663443 is 34436612228.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 82221663443 - 2³⁰ = 81147921619 is a prime.

It is a super-2 number, since 2×82221663443² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 82221663443.

It is not a weakly prime, because it can be changed into another prime (82221633443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41110831721 + 41110831722.

It is an arithmetic number, because the mean of its divisors is an integer number (41110831722).

Almost surely, 2^82221663443 is an apocalyptic number.

82221663443 is a deficient number, since it is larger than the sum of its proper divisors (1).

82221663443 is an equidigital number, since it uses as much as digits as its factorization.

82221663443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 331776, while the sum is 41.

The spelling of 82221663443 in words is "eighty-two billion, two hundred twenty-one million, six hundred sixty-three thousand, four hundred forty-three".