2221222200 has 48 divisors (see below), whose sum is σ = 6885790680. Its totient is φ = 592325760.

The previous prime is 2221222187. The next prime is 2221222207. The reversal of 2221222200 is 22221222.

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 2221222200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221222207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1850419 + ... + 1851618.

Almost surely, 2^2221222200 is an apocalyptic number.

2221222200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221222200 is an abundant number, since it is smaller than the sum of its proper divisors (4664568480).

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

2221222200 is a wasteful number, since it uses less digits than its factorization.

2221222200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3702056 (or 3702047 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 2221222200 is about 47129.8440481188. The cubic root of 2221222200 is about 1304.7601032876.

Adding to 2221222200 its reverse (22221222), we get a palindrome (2243443422).

The spelling of 2221222200 in words is "two billion, two hundred twenty-one million, two hundred twenty-two thousand, two hundred".