208851 has 8 divisors (see below), whose sum is σ = 285120. Its totient is φ = 135912.

The previous prime is 208843. The next prime is 208877. The reversal of 208851 is 158802.

Added to its reverse (158802) it gives a triangular number (367653 = T₈₅₇).

208851 is nontrivially palindromic in base 2.

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

It is not a de Polignac number, because 208851 - 2³ = 208843 is a prime.

208851 is a lucky 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, 681 + ... + 938.

It is an arithmetic number, because the mean of its divisors is an integer number (35640).

2²⁰⁸⁸⁵¹ is an apocalyptic number.

208851 is a deficient number, since it is larger than the sum of its proper divisors (76269).

208851 is a wasteful number, since it uses less digits than its factorization.

208851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1665.

The product of its (nonzero) digits is 640, while the sum is 24.

The square root of 208851 is about 457.0021881786. The cubic root of 208851 is about 59.3306153982.

Adding to 208851 its reverse (158802), we get a triangular number (367653 = T₈₅₇).

The spelling of 208851 in words is "two hundred eight thousand, eight hundred fifty-one".