221224241 has 8 divisors (see below), whose sum is σ = 253042944. Its totient is φ = 189459360.

The previous prime is 221224231. The next prime is 221224249. The reversal of 221224241 is 142422122.

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 221224241 - 2⁶ = 221224177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221224249) 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, 4220 + ... + 21453.

It is an arithmetic number, because the mean of its divisors is an integer number (31630368).

Almost surely, 2^221224241 is an apocalyptic number.

It is an amenable number.

221224241 is a deficient number, since it is larger than the sum of its proper divisors (31818703).

221224241 is a wasteful number, since it uses less digits than its factorization.

221224241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26911.

The product of its digits is 512, while the sum is 20.

The square root of 221224241 is about 14873.6088761269. The cubic root of 221224241 is about 604.7987774222.

Adding to 221224241 its reverse (142422122), we get a palindrome (363646363).

The spelling of 221224241 in words is "two hundred twenty-one million, two hundred twenty-four thousand, two hundred forty-one".