22459221 has 16 divisors (see below), whose sum is σ = 34347520. Its totient is φ = 14489280.

The previous prime is 22459187. The next prime is 22459231. The reversal of 22459221 is 12295422.

It is a happy number.

It is not a de Polignac number, because 22459221 - 2¹³ = 22451029 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22459231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12580 + ... + 14253.

It is an arithmetic number, because the mean of its divisors is an integer number (2146720).

Almost surely, 2^22459221 is an apocalyptic number.

It is an amenable number.

22459221 is a deficient number, since it is larger than the sum of its proper divisors (11888299).

22459221 is a wasteful number, since it uses less digits than its factorization.

22459221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26873 (or 26867 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 22459221 is about 4739.1160568190. The cubic root of 22459221 is about 282.1401521536.

The spelling of 22459221 in words is "twenty-two million, four hundred fifty-nine thousand, two hundred twenty-one".