222444100 has 18 divisors (see below), whose sum is σ = 482703914. Its totient is φ = 88977600.

The previous prime is 222444097. The next prime is 222444107. The reversal of 222444100 is 1444222.

It can be written as a sum of positive squares in 3 ways, for example, as 17438976 + 205005124 = 4176^2 + 14318^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222444107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1112121 + ... + 1112320.

Almost surely, 2^222444100 is an apocalyptic number.

222444100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222444100 is an abundant number, since it is smaller than the sum of its proper divisors (260259814).

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

222444100 is a wasteful number, since it uses less digits than its factorization.

222444100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2224455 (or 2224448 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 222444100 is about 14914.5600002146. The cubic root of 222444100 is about 605.9083865618.

Adding to 222444100 its reverse (1444222), we get a palindrome (223888322).

The spelling of 222444100 in words is "two hundred twenty-two million, four hundred forty-four thousand, one hundred".