211834197 has 20 divisors (see below), whose sum is σ = 319360140. Its totient is φ = 139921344.

The previous prime is 211834187. The next prime is 211834199. The reversal of 211834197 is 791438112.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 51710481 + 160123716 = 7191^2 + 12654^2 .

It is not a de Polignac number, because 211834197 - 2⁷ = 211834069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211834199) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3168 + ... + 20825.

It is an arithmetic number, because the mean of its divisors is an integer number (15968007).

Almost surely, 2^211834197 is an apocalyptic number.

211834197 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

211834197 is a deficient number, since it is larger than the sum of its proper divisors (107525943).

211834197 is a wasteful number, since it uses less digits than its factorization.

211834197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24114 (or 24105 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 211834197 is about 14554.5249664838. The cubic root of 211834197 is about 596.1177088729.

It can be divided in two parts, 2118 and 34197, that added together give a triangular number (36315 = T₂₆₉).

The spelling of 211834197 in words is "two hundred eleven million, eight hundred thirty-four thousand, one hundred ninety-seven".