208811 has 8 divisors (see below), whose sum is σ = 225504. Its totient is φ = 192640.

The previous prime is 208807. The next prime is 208837. The reversal of 208811 is 118802.

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

It is a cyclic number.

It is not a de Polignac number, because 208811 - 2² = 208807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208891) 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, 1121 + ... + 1293.

It is an arithmetic number, because the mean of its divisors is an integer number (28188).

2²⁰⁸⁸¹¹ is an apocalyptic number.

208811 is a deficient number, since it is larger than the sum of its proper divisors (16693).

208811 is a wasteful number, since it uses less digits than its factorization.

208811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261.

The product of its (nonzero) digits is 128, while the sum is 20.

The square root of 208811 is about 456.9584226163. The cubic root of 208811 is about 59.3268274088.

Subtracting from 208811 its reverse (118802), we obtain a palindrome (90009).

The spelling of 208811 in words is "two hundred eight thousand, eight hundred eleven".