211087 has 4 divisors (see below), whose sum is σ = 216040. Its totient is φ = 206136.

The previous prime is 211073. The next prime is 211093. The reversal of 211087 is 780112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 211087 - 2¹¹ = 209039 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2412 + ... + 2497.

It is an arithmetic number, because the mean of its divisors is an integer number (54010).

2²¹¹⁰⁸⁷ is an apocalyptic number.

211087 is a deficient number, since it is larger than the sum of its proper divisors (4953).

211087 is an equidigital number, since it uses as much as digits as its factorization.

211087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4952.

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 211087 is about 459.4420529294. The cubic root of 211087 is about 59.5415993252.

Adding to 211087 its reverse (780112), we get a palindrome (991199).

It can be divided in two parts, 21108 and 7, that added together give a triangular number (21115 = T₂₀₅).

The spelling of 211087 in words is "two hundred eleven thousand, eighty-seven".