221244227 has 4 divisors (see below), whose sum is σ = 232888680. Its totient is φ = 209599776.

The previous prime is 221244217. The next prime is 221244229. The reversal of 221244227 is 722442122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221244227 - 2¹⁴ = 221227843 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221244196 and 221244205.

It is not an unprimeable number, because it can be changed into a prime (221244229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5822198 + ... + 5822235.

It is an arithmetic number, because the mean of its divisors is an integer number (58222170).

Almost surely, 2^221244227 is an apocalyptic number.

221244227 is a deficient number, since it is larger than the sum of its proper divisors (11644453).

221244227 is a wasteful number, since it uses less digits than its factorization.

221244227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11644452.

The product of its digits is 3584, while the sum is 26.

The square root of 221244227 is about 14874.2807221055. The cubic root of 221244227 is about 604.8169899296.

Adding to 221244227 its reverse (722442122), we get a palindrome (943686349).

The spelling of 221244227 in words is "two hundred twenty-one million, two hundred forty-four thousand, two hundred twenty-seven".