222211000 has 64 divisors (see below), whose sum is σ = 567272160. Its totient is φ = 80800000.

The previous prime is 222210991. The next prime is 222211019. The reversal of 222211000 is 112222.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 900 + ... + 21100.

Almost surely, 2^222211000 is an apocalyptic number.

222211000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222211000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (283636080).

222211000 is an abundant number, since it is smaller than the sum of its proper divisors (345061160).

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

222211000 is a wasteful number, since it uses less digits than its factorization.

222211000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20233 (or 20219 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 222211000 is about 14906.7434404702. The cubic root of 222211000 is about 605.6966680402.

Adding to 222211000 its reverse (112222), we get a palindrome (222323222).

The spelling of 222211000 in words is "two hundred twenty-two million, two hundred eleven thousand".