212166550 has 24 divisors (see below), whose sum is σ = 395383176. Its totient is φ = 84704640.

The previous prime is 212166541. The next prime is 212166551. The reversal of 212166550 is 55661212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212166551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24382 + ... + 31918.

It is an arithmetic number, because the mean of its divisors is an integer number (16474299).

Almost surely, 2^212166550 is an apocalyptic number.

212166550 is a deficient number, since it is larger than the sum of its proper divisors (183216626).

212166550 is a wasteful number, since it uses less digits than its factorization.

212166550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8112 (or 8107 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 212166550 is about 14565.9380061842. The cubic root of 212166550 is about 596.4293016012.

The spelling of 212166550 in words is "two hundred twelve million, one hundred sixty-six thousand, five hundred fifty".