82221219 has 12 divisors (see below), whose sum is σ = 118892592. Its totient is φ = 54754800.

The previous prime is 82221199. The next prime is 82221221. The reversal of 82221219 is 91212228.

It is not a de Polignac number, because 82221219 - 2⁵ = 82221187 is a prime.

It is a super-2 number, since 2×82221219² = 13520657707691922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 82221192 and 82221201.

It is not an unprimeable number, because it can be changed into a prime (82221319) 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 in 11 ways as a sum of consecutive naturals, for example, 4849 + ... + 13709.

It is an arithmetic number, because the mean of its divisors is an integer number (9907716).

Almost surely, 2^82221219 is an apocalyptic number.

82221219 is a deficient number, since it is larger than the sum of its proper divisors (36671373).

82221219 is a wasteful number, since it uses less digits than its factorization.

82221219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9898 (or 9895 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 82221219 is about 9067.5916868814. The cubic root of 82221219 is about 434.8384814534.

The spelling of 82221219 in words is "eighty-two million, two hundred twenty-one thousand, two hundred nineteen".