212216366 has 4 divisors (see below), whose sum is σ = 318324552. Its totient is φ = 106108182.

The previous prime is 212216353. The next prime is 212216371. The reversal of 212216366 is 663612212.

212216366 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

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, 53054090 + ... + 53054093.

It is an arithmetic number, because the mean of its divisors is an integer number (79581138).

Almost surely, 2^212216366 is an apocalyptic number.

212216366 is a deficient number, since it is larger than the sum of its proper divisors (106108186).

212216366 is a wasteful number, since it uses less digits than its factorization.

212216366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106108185.

The product of its digits is 5184, while the sum is 29.

The square root of 212216366 is about 14567.6479227087. The cubic root of 212216366 is about 596.4759778201.

Adding to 212216366 its reverse (663612212), we get a palindrome (875828578).

The spelling of 212216366 in words is "two hundred twelve million, two hundred sixteen thousand, three hundred sixty-six".