211 has 2 divisors, whose sum is σ = 212.
Its totient is φ = 210.
The previous prime is 199. The next prime is 223. The reversal of 211 is 112.
211 is nontrivially palindromic in base 8 and base 14.
211 is an esthetic number in base 8, because in such base its adjacent digits differ by 1.
It is a balanced prime because it is at equal distance from previous prime (199) and next prime (223).
It is a cyclic number.
It is not a de Polignac number, because 211 - 25 = 179 is a prime.
It is a Chen prime.
It is the 15-th Hogben number.
It is a pancake number, because a pancake can be divided into 211 parts by 20 straight cuts.
It is a lonely number, since its distance to closest prime (223) sets a new record.
211 is an undulating number in base 8.
211 is a modest number, since divided by 11 gives 2 as remainder.
211 is a lucky number.
211 is a nontrivial repdigit in base 14.
It is a plaindrome in base 12, base 13 and base 14.
It is a nialpdrome in base 6, base 7, base 10, base 14, base 15 and base 16.
It is a zygodrome in base 14.
It is a self number, because there is not a number n which added to its sum of digits gives 211.
It is a panconsummate number.
It is not a weakly prime, because it can be changed into another prime (241) by changing a digit.
It is a nontrivial repunit in base 14.
It is a pernicious number, because its binary representation contains a prime number (5) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105 + 106.
It is an arithmetic number, because the mean of its divisors is an integer number (106).
211 is the 7-th centered decagonal number.
211 is a deficient number, since it is larger than the sum of its proper divisors (1).
211 is an equidigital number, since it uses as much as digits as its factorization.
211 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 2, while the sum is 4.
The square root of 211 is about 14.5258390463.
The cubic root of 211 is about 5.9533418131.
Adding to 211 its reverse (112), we get a palindrome (323).
Subtracting from 211 its reverse (112), we obtain a palindrome (99).
Multiplying 211 by its reverse (112), we get a palindrome (23632).
It can be divided in two parts, 21 and 1, that added together give a palindrome (22).
The spelling of 211 in words is "two hundred eleven", and thus it is an aban number and an iban number.