Adding to 222420 its reverse (24222), we get a palindrome (246642).
It is a happy number.
222420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a nialpdrome in base 12.
It is a congruent number.
It is an unprimeable number.
2222420 is an apocalyptic number.
222420 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 222420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (340704).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
222420 is a wasteful number, since it uses less digits than its factorization.
222420 is an odious number, because the sum of its binary digits is odd.
The square root of 222420 is about 471.6142491486. The cubic root of 222420 is about 60.5886504031.
The spelling of 222420 in words is "two hundred twenty-two thousand, four hundred twenty", and thus it is an iban number.