211984 has 10 divisors (see below), whose sum is σ = 410750. Its totient is φ = 105984.

The previous prime is 211979. The next prime is 211997. The reversal of 211984 is 489112.

It is a happy number.

211984 is nontrivially palindromic in base 15.

211984 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 160000 + 51984 = 400^2 + 228^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6609 + ... + 6640.

It is an arithmetic number, because the mean of its divisors is an integer number (41075).

2²¹¹⁹⁸⁴ is an apocalyptic number.

It is an amenable number.

211984 is a deficient number, since it is larger than the sum of its proper divisors (198766).

211984 is a wasteful number, since it uses less digits than its factorization.

211984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13257 (or 13251 counting only the distinct ones).

The product of its digits is 576, while the sum is 25.

The square root of 211984 is about 460.4172021113. The cubic root of 211984 is about 59.6258194813.

The spelling of 211984 in words is "two hundred eleven thousand, nine hundred eighty-four".