212216517166 has 4 divisors (see below), whose sum is σ = 318324775752. Its totient is φ = 106108258582.

The previous prime is 212216517157. The next prime is 212216517169. The reversal of 212216517166 is 661715612212.

212216517166 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 not an unprimeable number, because it can be changed into a prime (212216517169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53054129290 + ... + 53054129293.

It is an arithmetic number, because the mean of its divisors is an integer number (79581193938).

Almost surely, 2^212216517166 is an apocalyptic number.

212216517166 is a deficient number, since it is larger than the sum of its proper divisors (106108258586).

212216517166 is a wasteful number, since it uses less digits than its factorization.

212216517166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106108258585.

The product of its digits is 60480, while the sum is 40.

The spelling of 212216517166 in words is "two hundred twelve billion, two hundred sixteen million, five hundred seventeen thousand, one hundred sixty-six".