211139 has 4 divisors (see below), whose sum is σ = 212400. Its totient is φ = 209880.

The previous prime is 211129. The next prime is 211151. The reversal of 211139 is 931112.

It is a happy number.

211139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 211139 - 2¹⁶ = 145603 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (211129) 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, 332 + ... + 729.

It is an arithmetic number, because the mean of its divisors is an integer number (53100).

2²¹¹¹³⁹ is an apocalyptic number.

211139 is a deficient number, since it is larger than the sum of its proper divisors (1261).

211139 is a wasteful number, since it uses less digits than its factorization.

211139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1260.

The product of its digits is 54, while the sum is 17.

The square root of 211139 is about 459.4986398239. The cubic root of 211139 is about 59.5464881609.

The spelling of 211139 in words is "two hundred eleven thousand, one hundred thirty-nine".