210885 has 16 divisors (see below), whose sum is σ = 357696. Its totient is φ = 105728.

The previous prime is 210869. The next prime is 210901. The reversal of 210885 is 588012.

It is an interprime number because it is at equal distance from previous prime (210869) and next prime (210901).

It is a cyclic number.

It is not a de Polignac number, because 210885 - 2⁴ = 210869 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 159 + ... + 668.

It is an arithmetic number, because the mean of its divisors is an integer number (22356).

2²¹⁰⁸⁸⁵ is an apocalyptic number.

It is an amenable number.

210885 is a deficient number, since it is larger than the sum of its proper divisors (146811).

210885 is a wasteful number, since it uses less digits than its factorization.

210885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852.

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

The square root of 210885 is about 459.2221684544. Note that the first 3 decimals coincide. The cubic root of 210885 is about 59.5226004580.

Adding to 210885 its reverse (588012), we get a palindrome (798897).

The spelling of 210885 in words is "two hundred ten thousand, eight hundred eighty-five".