210222 has 32 divisors (see below), whose sum is σ = 496800. Its totient is φ = 65664.

The previous prime is 210209. The next prime is 210229. The reversal of 210222 is 222012.

It is a Harshad number since it is a multiple of its sum of digits (9).

210222 is a modest number, since divided by 222 gives 210 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210229) by changing a digit.

210222 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 804 + ... + 1032.

It is an arithmetic number, because the mean of its divisors is an integer number (15525).

2²¹⁰²²² is an apocalyptic number.

It is a pronic number, being equal to 458×459.

It is a practical number, because each smaller number is the sum of distinct divisors of 210222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248400).

210222 is an abundant number, since it is smaller than the sum of its proper divisors (286578).

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

210222 is a wasteful number, since it uses less digits than its factorization.

210222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257 (or 251 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 210222 is about 458.4997273718. The cubic root of 210222 is about 59.4601574000.

Adding to 210222 its reverse (222012), we get a palindrome (432234).

The spelling of 210222 in words is "two hundred ten thousand, two hundred twenty-two", and thus it is an iban number.