222424221 has 8 divisors (see below), whose sum is σ = 303799104. Its totient is φ = 144666080.

The previous prime is 222424193. The next prime is 222424247. The reversal of 222424221 is 122424222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 222424221 - 2¹¹ = 222422173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222424271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 904041 + ... + 904286.

It is an arithmetic number, because the mean of its divisors is an integer number (37974888).

Almost surely, 2^222424221 is an apocalyptic number.

It is an amenable number.

222424221 is a deficient number, since it is larger than the sum of its proper divisors (81374883).

222424221 is a wasteful number, since it uses less digits than its factorization.

222424221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1808371.

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

The square root of 222424221 is about 14913.8935560101. The cubic root of 222424221 is about 605.8903367662.

Adding to 222424221 its reverse (122424222), we get a palindrome (344848443).

Subtracting from 222424221 its reverse (122424222), we obtain a palindrome (99999999).

The spelling of 222424221 in words is "two hundred twenty-two million, four hundred twenty-four thousand, two hundred twenty-one".