223821120 has 168 divisors, whose sum is σ = 733019616. Its totient is φ = 57853952.

The previous prime is 223821089. The next prime is 223821131. The reversal of 223821120 is 21128322.

It is a happy number.

223821120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 2696599 + ... + 2696681.

It is an arithmetic number, because the mean of its divisors is an integer number (4363212).

Almost surely, 2^223821120 is an apocalyptic number.

223821120 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 223821120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (366509808).

223821120 is an abundant number, since it is smaller than the sum of its proper divisors (509198496).

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

223821120 is an equidigital number, since it uses as much as digits as its factorization.

223821120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209 (or 146 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 223821120 is about 14960.6523921920. The cubic root of 223821120 is about 607.1560891102.

Adding to 223821120 its reverse (21128322), we get a palindrome (244949442).

The spelling of 223821120 in words is "two hundred twenty-three million, eight hundred twenty-one thousand, one hundred twenty".