212166242 has 16 divisors (see below), whose sum is σ = 325321920. Its totient is φ = 103744368.

The previous prime is 212166223. The next prime is 212166259. The reversal of 212166242 is 242661212.

212166242 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 in 7 ways as a sum of consecutive naturals, for example, 18683 + ... + 27809.

It is an arithmetic number, because the mean of its divisors is an integer number (20332620).

Almost surely, 2^212166242 is an apocalyptic number.

212166242 is a deficient number, since it is larger than the sum of its proper divisors (113155678).

212166242 is a wasteful number, since it uses less digits than its factorization.

212166242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9385.

The product of its digits is 2304, while the sum is 26.

The square root of 212166242 is about 14565.9274335691. The cubic root of 212166242 is about 596.4290129910.

The spelling of 212166242 in words is "two hundred twelve million, one hundred sixty-six thousand, two hundred forty-two".