211065834 has 48 divisors (see below), whose sum is σ = 504348768. Its totient is φ = 58671648.

The previous prime is 211065781. The next prime is 211065839. The reversal of 211065834 is 438560112.

It is not an unprimeable number, because it can be changed into a prime (211065839) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1177 + ... + 20579.

It is an arithmetic number, because the mean of its divisors is an integer number (10507266).

Almost surely, 2^211065834 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211065834, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (252174384).

211065834 is an abundant number, since it is smaller than the sum of its proper divisors (293282934).

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

211065834 is a wasteful number, since it uses less digits than its factorization.

211065834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19459 (or 19452 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 211065834 is about 14528.1049693344. The cubic root of 211065834 is about 595.3960915113.

The spelling of 211065834 in words is "two hundred eleven million, sixty-five thousand, eight hundred thirty-four".