211901166 has 12 divisors (see below), whose sum is σ = 459119232. Its totient is φ = 70633716.

The previous prime is 211901159. The next prime is 211901201. The reversal of 211901166 is 661109112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5886126 + ... + 5886161.

It is an arithmetic number, because the mean of its divisors is an integer number (38259936).

Almost surely, 2^211901166 is an apocalyptic number.

211901166 is an abundant number, since it is smaller than the sum of its proper divisors (247218066).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211901166 is a wasteful number, since it uses less digits than its factorization.

211901166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11772295 (or 11772292 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 211901166 is about 14556.8254094085. The cubic root of 211901166 is about 596.1805208916.

The spelling of 211901166 in words is "two hundred eleven million, nine hundred one thousand, one hundred sixty-six".