22453221 has 48 divisors (see below), whose sum is σ = 37756800. Its totient is φ = 11797632.

The previous prime is 22453183. The next prime is 22453229. The reversal of 22453221 is 12235422.

It is not a de Polignac number, because 22453221 - 2⁶ = 22453157 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22453229) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 97935 + ... + 98163.

It is an arithmetic number, because the mean of its divisors is an integer number (786600).

Almost surely, 2^22453221 is an apocalyptic number.

22453221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22453221 is a deficient number, since it is larger than the sum of its proper divisors (15303579).

22453221 is a wasteful number, since it uses less digits than its factorization.

22453221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298 (or 291 counting only the distinct ones).

The product of its digits is 960, while the sum is 21.

The square root of 22453221 is about 4738.4829850913. The cubic root of 22453221 is about 282.1150252553.

Adding to 22453221 its reverse (12235422), we get a palindrome (34688643).

The spelling of 22453221 in words is "twenty-two million, four hundred fifty-three thousand, two hundred twenty-one".