82771222 has 4 divisors (see below), whose sum is σ = 124156836. Its totient is φ = 41385610.

The previous prime is 82771189. The next prime is 82771229. The reversal of 82771222 is 22217728.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82771229) 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, 20692804 + ... + 20692807.

It is an arithmetic number, because the mean of its divisors is an integer number (31039209).

Almost surely, 2^82771222 is an apocalyptic number.

82771222 is a deficient number, since it is larger than the sum of its proper divisors (41385614).

82771222 is a wasteful number, since it uses less digits than its factorization.

82771222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41385613.

The product of its digits is 6272, while the sum is 31.

The square root of 82771222 is about 9097.8690911663. The cubic root of 82771222 is about 435.8059169003.

The spelling of 82771222 in words is "eighty-two million, seven hundred seventy-one thousand, two hundred twenty-two".