22021223 has 12 divisors (see below), whose sum is σ = 25874352. Its totient is φ = 18348480.

The previous prime is 22021211. The next prime is 22021229. The reversal of 22021223 is 32212022.

It is not a de Polignac number, because 22021223 - 2⁶ = 22021159 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22021198 and 22021207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22021229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79361 + ... + 79637.

It is an arithmetic number, because the mean of its divisors is an integer number (2156196).

Almost surely, 2^22021223 is an apocalyptic number.

22021223 is a deficient number, since it is larger than the sum of its proper divisors (3853129).

22021223 is an frugal number, since it uses more digits than its factorization.

22021223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602 (or 325 counting only the distinct ones).

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

The square root of 22021223 is about 4692.6775938690. The cubic root of 22021223 is about 280.2940066542.

Adding to 22021223 its reverse (32212022), we get a palindrome (54233245).

The spelling of 22021223 in words is "twenty-two million, twenty-one thousand, two hundred twenty-three".