222444220 has 48 divisors (see below), whose sum is σ = 483840000. Its totient is φ = 85815360.

The previous prime is 222444217. The next prime is 222444223. The reversal of 222444220 is 22444222.

It is a happy number.

222444220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (222444217) and next prime (222444223).

It is a super-2 number, since 2×222444220² = 98962862022816800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 222444191 and 222444200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222444223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 309021 + ... + 309739.

It is an arithmetic number, because the mean of its divisors is an integer number (10080000).

Almost surely, 2^222444220 is an apocalyptic number.

222444220 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 222444220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241920000).

222444220 is an abundant number, since it is smaller than the sum of its proper divisors (261395780).

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

222444220 is a wasteful number, since it uses less digits than its factorization.

222444220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1258 (or 1256 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 22.

The square root of 222444220 is about 14914.5640231285. The cubic root of 222444220 is about 605.9084955165.

Adding to 222444220 its reverse (22444222), we get a palindrome (244888442).

The spelling of 222444220 in words is "two hundred twenty-two million, four hundred forty-four thousand, two hundred twenty".