222442220 has 192 divisors, whose sum is σ = 644861952. Its totient is φ = 62208000.

The previous prime is 222442217. The next prime is 222442237. The reversal of 222442220 is 22244222.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 222442192 and 222442201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 820685 + ... + 820955.

It is an arithmetic number, because the mean of its divisors is an integer number (3358656).

Almost surely, 2^222442220 is an apocalyptic number.

222442220 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 222442220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (322430976).

222442220 is an abundant number, since it is smaller than the sum of its proper divisors (422419732).

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

222442220 is a wasteful number, since it uses less digits than its factorization.

222442220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352 (or 350 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 222442220 is about 14914.4969744206. The cubic root of 222442220 is about 605.9066795997.

222442220 divided by its sum of digits (20) gives a palindrome (11122111).

Adding to 222442220 its reverse (22244222), we get a palindrome (244686442).

It can be divided in two parts, 2224 and 42220, that added together give a palindrome (44444).

The spelling of 222442220 in words is "two hundred twenty-two million, four hundred forty-two thousand, two hundred twenty".