82221546277 has 4 divisors (see below), whose sum is σ = 88546280620. Its totient is φ = 75896811936.

The previous prime is 82221546259. The next prime is 82221546289. The reversal of 82221546277 is 77264512228.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 40943903716 + 41277642561 = 202346^2 + 203169^2 .

It is a cyclic number.

It is not a de Polignac number, because 82221546277 - 2⁷ = 82221546149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82221546577) 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 in 3 ways as a sum of consecutive naturals, for example, 3162367152 + ... + 3162367177.

It is an arithmetic number, because the mean of its divisors is an integer number (22136570155).

Almost surely, 2^82221546277 is an apocalyptic number.

It is an amenable number.

82221546277 is a deficient number, since it is larger than the sum of its proper divisors (6324734343).

82221546277 is a wasteful number, since it uses less digits than its factorization.

82221546277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6324734342.

The product of its digits is 752640, while the sum is 46.

The spelling of 82221546277 in words is "eighty-two billion, two hundred twenty-one million, five hundred forty-six thousand, two hundred seventy-seven".