82211776 has 14 divisors (see below), whose sum is σ = 163139120. Its totient is φ = 41105856.

The previous prime is 82211771. The next prime is 82211809. The reversal of 82211776 is 67711228.

It is a happy number.

It is a super-2 number, since 2×82211776² = 13517552226148352, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82211771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642216 + ... + 642343.

Almost surely, 2^82211776 is an apocalyptic number.

It is an amenable number.

82211776 is a deficient number, since it is larger than the sum of its proper divisors (80927344).

82211776 is a wasteful number, since it uses less digits than its factorization.

82211776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1284571 (or 1284561 counting only the distinct ones).

The product of its digits is 9408, while the sum is 34.

The square root of 82211776 is about 9067.0709713777. The cubic root of 82211776 is about 434.8218339382.

The spelling of 82211776 in words is "eighty-two million, two hundred eleven thousand, seven hundred seventy-six".