82216212 has 48 divisors (see below), whose sum is σ = 207164160. Its totient is φ = 25227648.

The previous prime is 82216163. The next prime is 82216213. The reversal of 82216212 is 21261228.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82216213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111798 + ... + 112530.

It is an arithmetic number, because the mean of its divisors is an integer number (4315920).

Almost surely, 2^82216212 is an apocalyptic number.

It is an amenable number.

82216212 is an abundant number, since it is smaller than the sum of its proper divisors (124947948).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

82216212 is a wasteful number, since it uses less digits than its factorization.

82216212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1472 (or 1470 counting only the distinct ones).

The product of its digits is 768, while the sum is 24.

The square root of 82216212 is about 9067.3155895226. The cubic root of 82216212 is about 434.8296545330.

It can be divided in two parts, 82216 and 212, that added together give a palindrome (82428).

The spelling of 82216212 in words is "eighty-two million, two hundred sixteen thousand, two hundred twelve".