211983 has 8 divisors (see below), whose sum is σ = 297600. Its totient is φ = 133848.

The previous prime is 211979. The next prime is 211997. The reversal of 211983 is 389112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 211983 - 2² = 211979 is a prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1803 + ... + 1916.

It is an arithmetic number, because the mean of its divisors is an integer number (37200).

2²¹¹⁹⁸³ is an apocalyptic number.

211983 is a deficient number, since it is larger than the sum of its proper divisors (85617).

211983 is a wasteful number, since it uses less digits than its factorization.

211983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3741.

The product of its digits is 432, while the sum is 24.

The square root of 211983 is about 460.4161161384. The cubic root of 211983 is about 59.6257257228.

The spelling of 211983 in words is "two hundred eleven thousand, nine hundred eighty-three".