224005221 has 12 divisors (see below), whose sum is σ = 352978080. Its totient is φ = 135760680.

The previous prime is 224005219. The next prime is 224005247. The reversal of 224005221 is 122500422.

It is not a de Polignac number, because 224005221 - 2¹ = 224005219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 224005194 and 224005203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224005291) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1131241 + ... + 1131438.

It is an arithmetic number, because the mean of its divisors is an integer number (29414840).

Almost surely, 2^224005221 is an apocalyptic number.

It is an amenable number.

224005221 is a deficient number, since it is larger than the sum of its proper divisors (128972859).

224005221 is a wasteful number, since it uses less digits than its factorization.

224005221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2262696 (or 2262693 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 224005221 is about 14966.8039674474. The cubic root of 224005221 is about 607.3225128001.

Adding to 224005221 its reverse (122500422), we get a palindrome (346505643).

The spelling of 224005221 in words is "two hundred twenty-four million, five thousand, two hundred twenty-one".