22606221 has 16 divisors (see below), whose sum is σ = 33000768. Its totient is φ = 13651200.

The previous prime is 22606189. The next prime is 22606231. The reversal of 22606221 is 12260622.

22606221 = 428² + 429² + ... + 526².

It is not a de Polignac number, because 22606221 - 2⁵ = 22606189 is a prime.

It is a super-3 number, since 3×22606221³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22606231) 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 15 ways as a sum of consecutive naturals, for example, 9381 + ... + 11541.

It is an arithmetic number, because the mean of its divisors is an integer number (2062548).

Almost surely, 2^22606221 is an apocalyptic number.

It is an amenable number.

22606221 is a deficient number, since it is larger than the sum of its proper divisors (10394547).

22606221 is a wasteful number, since it uses less digits than its factorization.

22606221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2492.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 22606221 is about 4754.5999831742. The cubic root of 22606221 is about 282.7543682255.

Adding to 22606221 its reverse (12260622), we get a palindrome (34866843).

The spelling of 22606221 in words is "twenty-two million, six hundred six thousand, two hundred twenty-one".