222123210 has 64 divisors (see below), whose sum is σ = 553416192. Its totient is φ = 57010176.

The previous prime is 222123191. The next prime is 222123217. The reversal of 222123210 is 12321222.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 222123210.

It is not an unprimeable number, because it can be changed into a prime (222123217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 106639 + ... + 108701.

It is an arithmetic number, because the mean of its divisors is an integer number (8647128).

Almost surely, 2^222123210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222123210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (276708096).

222123210 is an abundant number, since it is smaller than the sum of its proper divisors (331292982).

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

222123210 is a wasteful number, since it uses less digits than its factorization.

222123210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2207.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 222123210 is about 14903.7985091050. The cubic root of 222123210 is about 605.6168923396.

Adding to 222123210 its reverse (12321222), we get a palindrome (234444432).

The spelling of 222123210 in words is "two hundred twenty-two million, one hundred twenty-three thousand, two hundred ten".