222428100 has 72 divisors (see below), whose sum is σ = 664346368. Its totient is φ = 57398400.

The previous prime is 222428099. The next prime is 222428113. The reversal of 222428100 is 1824222.

It is a happy number.

It is a super-2 number, since 2×222428100² = 98948519339220000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2659 + ... + 21258.

Almost surely, 2^222428100 is an apocalyptic number.

222428100 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 222428100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (332173184).

222428100 is an abundant number, since it is smaller than the sum of its proper divisors (441918268).

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

222428100 is a wasteful number, since it uses less digits than its factorization.

222428100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23965 (or 23958 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 222428100 is about 14914.0236019660. The cubic root of 222428100 is about 605.8938589170.

The spelling of 222428100 in words is "two hundred twenty-two million, four hundred twenty-eight thousand, one hundred".