222100000 has 72 divisors (see below), whose sum is σ = 546785316. Its totient is φ = 88800000.

The previous prime is 222099991. The next prime is 222100037. The reversal of 222100000 is 1222.

It is a happy number.

222100000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 15085456 + 207014544 = 3884^2 + 14388^2 .

It is a nialpdrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 98890 + ... + 101110.

Almost surely, 2^222100000 is an apocalyptic number.

222100000 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 222100000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (273392658).

222100000 is an abundant number, since it is smaller than the sum of its proper divisors (324685316).

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

222100000 is an frugal number, since it uses more digits than its factorization.

222100000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2256 (or 2228 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 222100000 is about 14903.0198282093. The cubic root of 222100000 is about 605.5957976542.

Adding to 222100000 its reverse (1222), we get a palindrome (222101222).

The spelling of 222100000 in words is "two hundred twenty-two million, one hundred thousand".