222200100 has 54 divisors (see below), whose sum is σ = 696476690. Its totient is φ = 59253120.

The previous prime is 222200071. The next prime is 222200119. The reversal of 222200100 is 1002222.

It can be written as a sum of positive squares in 3 ways, for example, as 37675044 + 184525056 = 6138^2 + 13584^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 122545 + ... + 124344.

Almost surely, 2^222200100 is an apocalyptic number.

222200100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222200100 is an abundant number, since it is smaller than the sum of its proper divisors (474276590).

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

222200100 is a wasteful number, since it uses less digits than its factorization.

222200100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246909 (or 246899 counting only the distinct ones).

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

The square root of 222200100 is about 14906.3778296406. The cubic root of 222200100 is about 605.6867642376.

Adding to 222200100 its reverse (1002222), we get a palindrome (223202322).

The spelling of 222200100 in words is "two hundred twenty-two million, two hundred thousand, one hundred".