222204400 has 90 divisors (see below), whose sum is σ = 586917296. Its totient is φ = 80784000.

The previous prime is 222204341. The next prime is 222204401. The reversal of 222204400 is 4402222.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222204401) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 46105 + ... + 50695.

Almost surely, 2^222204400 is an apocalyptic number.

222204400 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 222204400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (293458648).

222204400 is an abundant number, since it is smaller than the sum of its proper divisors (364712896).

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

222204400 is a wasteful number, since it uses less digits than its factorization.

222204400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4631 (or 4609 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 222204400 is about 14906.5220625067. The cubic root of 222204400 is about 605.6906712810.

Adding to 222204400 its reverse (4402222), we get a palindrome (226606622).

The spelling of 222204400 in words is "two hundred twenty-two million, two hundred four thousand, four hundred".