210256 has 20 divisors (see below), whose sum is σ = 431892. Its totient is φ = 98816.

The previous prime is 210247. The next prime is 210257. The reversal of 210256 is 652012.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 80656 + 129600 = 284^2 + 360^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210257) 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, 115 + ... + 658.

2²¹⁰²⁵⁶ is an apocalyptic number.

It is an amenable number.

210256 is an abundant number, since it is smaller than the sum of its proper divisors (221636).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

210256 is a wasteful number, since it uses less digits than its factorization.

210256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798 (or 792 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 210256 is about 458.5368033212. The cubic root of 210256 is about 59.4633627994.

Adding to 210256 its reverse (652012), we get a palindrome (862268).

The spelling of 210256 in words is "two hundred ten thousand, two hundred fifty-six".