224221220 has 12 divisors (see below), whose sum is σ = 470864604. Its totient is φ = 89688480.

The previous prime is 224221199. The next prime is 224221241. The reversal of 224221220 is 22122422.

It is an interprime number because it is at equal distance from previous prime (224221199) and next prime (224221241).

It can be written as a sum of positive squares in 2 ways, for example, as 53553124 + 170668096 = 7318^2 + 13064^2 .

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 3 ways as a sum of consecutive naturals, for example, 5605511 + ... + 5605550.

It is an arithmetic number, because the mean of its divisors is an integer number (39238717).

Almost surely, 2^224221220 is an apocalyptic number.

224221220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

224221220 is an abundant number, since it is smaller than the sum of its proper divisors (246643384).

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

224221220 is a wasteful number, since it uses less digits than its factorization.

224221220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11211070 (or 11211068 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 224221220 is about 14974.0181648080. The cubic root of 224221220 is about 607.5176554449.

Adding to 224221220 its reverse (22122422), we get a palindrome (246343642).

The spelling of 224221220 in words is "two hundred twenty-four million, two hundred twenty-one thousand, two hundred twenty".