211666134 has 16 divisors (see below), whose sum is σ = 423864000. Its totient is φ = 70466760.

The previous prime is 211666129. The next prime is 211666163. The reversal of 211666134 is 431666112.

211666134 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16884 + ... + 26615.

It is an arithmetic number, because the mean of its divisors is an integer number (26491500).

Almost surely, 2^211666134 is an apocalyptic number.

211666134 is an abundant number, since it is smaller than the sum of its proper divisors (212197866).

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

211666134 is a wasteful number, since it uses less digits than its factorization.

211666134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44315.

The product of its digits is 5184, while the sum is 30.

The square root of 211666134 is about 14548.7502556061. The cubic root of 211666134 is about 595.9600197646.

The spelling of 211666134 in words is "two hundred eleven million, six hundred sixty-six thousand, one hundred thirty-four".