22636221 has 8 divisors (see below), whose sum is σ = 30480864. Its totient is φ = 14941200.

The previous prime is 22636219. The next prime is 22636241. The reversal of 22636221 is 12263622.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22636221 - 2¹ = 22636219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22636191 and 22636200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22636241) 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, 37051 + ... + 37656.

It is an arithmetic number, because the mean of its divisors is an integer number (3810108).

Almost surely, 2^22636221 is an apocalyptic number.

It is an amenable number.

22636221 is a deficient number, since it is larger than the sum of its proper divisors (7844643).

22636221 is a wasteful number, since it uses less digits than its factorization.

22636221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74811.

The product of its digits is 1728, while the sum is 24.

The square root of 22636221 is about 4757.7537767312. The cubic root of 22636221 is about 282.8793910598.

Adding to 22636221 its reverse (12263622), we get a palindrome (34899843).

The spelling of 22636221 in words is "twenty-two million, six hundred thirty-six thousand, two hundred twenty-one".