22230221 has 4 divisors (see below), whose sum is σ = 23940252. Its totient is φ = 20520192.

The previous prime is 22230149. The next prime is 22230227. The reversal of 22230221 is 12203222.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7214596 + 15015625 = 2686^2 + 3875^2 .

It is a cyclic number.

It is not a de Polignac number, because 22230221 - 2¹⁰ = 22229197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22230196 and 22230205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22230227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 854996 + ... + 855021.

It is an arithmetic number, because the mean of its divisors is an integer number (5985063).

Almost surely, 2^22230221 is an apocalyptic number.

It is an amenable number.

22230221 is a deficient number, since it is larger than the sum of its proper divisors (1710031).

22230221 is a wasteful number, since it uses less digits than its factorization.

22230221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1710030.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 22230221 is about 4714.8935300810. The cubic root of 22230221 is about 281.1779498731.

Adding to 22230221 its reverse (12203222), we get a palindrome (34433443).

The spelling of 22230221 in words is "twenty-two million, two hundred thirty thousand, two hundred twenty-one".