82212225 has 12 divisors (see below), whose sum is σ = 135924336. Its totient is φ = 43846480.

The previous prime is 82212223. The next prime is 82212239. The reversal of 82212225 is 52221228.

It is not a de Polignac number, because 82212225 - 2¹ = 82212223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 82212195 and 82212204.

It is not an unprimeable number, because it can be changed into a prime (82212223) 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, 548007 + ... + 548156.

It is an arithmetic number, because the mean of its divisors is an integer number (11327028).

Almost surely, 2^82212225 is an apocalyptic number.

It is an amenable number.

82212225 is a deficient number, since it is larger than the sum of its proper divisors (53712111).

82212225 is a wasteful number, since it uses less digits than its factorization.

82212225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1096176 (or 1096171 counting only the distinct ones).

The product of its digits is 1280, while the sum is 24.

The square root of 82212225 is about 9067.0957312692. The cubic root of 82212225 is about 434.8226255306.

The spelling of 82212225 in words is "eighty-two million, two hundred twelve thousand, two hundred twenty-five".