221441224 has 32 divisors (see below), whose sum is σ = 424080000. Its totient is φ = 108371520.

The previous prime is 221441197. The next prime is 221441237. The reversal of 221441224 is 422144122.

221441224 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 221441195 and 221441204.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109777 + ... + 111775.

It is an arithmetic number, because the mean of its divisors is an integer number (13252500).

Almost surely, 2^221441224 is an apocalyptic number.

It is an amenable number.

221441224 is a deficient number, since it is larger than the sum of its proper divisors (202638776).

221441224 is a wasteful number, since it uses less digits than its factorization.

221441224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2293 (or 2289 counting only the distinct ones).

The product of its digits is 1024, while the sum is 22.

The square root of 221441224 is about 14880.9013167886. The cubic root of 221441224 is about 604.9964473985.

Adding to 221441224 its reverse (422144122), we get a palindrome (643585346).

The spelling of 221441224 in words is "two hundred twenty-one million, four hundred forty-one thousand, two hundred twenty-four".