224224221 has 16 divisors (see below), whose sum is σ = 322607936. Its totient is φ = 137707776.

The previous prime is 224224219. The next prime is 224224223. The reversal of 224224221 is 122422422.

It is an interprime number because it is at equal distance from previous prime (224224219) and next prime (224224223).

It is not a de Polignac number, because 224224221 - 2¹ = 224224219 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224224223) 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, 14901 + ... + 25893.

It is an arithmetic number, because the mean of its divisors is an integer number (20162996).

Almost surely, 2^224224221 is an apocalyptic number.

It is an amenable number.

224224221 is a deficient number, since it is larger than the sum of its proper divisors (98383715).

224224221 is a wasteful number, since it uses less digits than its factorization.

224224221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11532.

The product of its digits is 1024, while the sum is 21.

The square root of 224224221 is about 14974.1183713767. The cubic root of 224224221 is about 607.5203657926.

Adding to 224224221 its reverse (122422422), we get a palindrome (346646643).

The spelling of 224224221 in words is "two hundred twenty-four million, two hundred twenty-four thousand, two hundred twenty-one".