22216452 has 12 divisors (see below), whose sum is σ = 51838416. Its totient is φ = 7405480.

The previous prime is 22216451. The next prime is 22216457. The reversal of 22216452 is 25461222.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (22216451) 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 3 ways as a sum of consecutive naturals, for example, 925674 + ... + 925697.

It is an arithmetic number, because the mean of its divisors is an integer number (4319868).

Almost surely, 2^22216452 is an apocalyptic number.

It is an amenable number.

22216452 is an abundant number, since it is smaller than the sum of its proper divisors (29621964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22216452 is a wasteful number, since it uses less digits than its factorization.

22216452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1851378 (or 1851376 counting only the distinct ones).

The product of its digits is 1920, while the sum is 24.

The square root of 22216452 is about 4713.4331436862. The cubic root of 22216452 is about 281.1198856912.

Adding to 22216452 its reverse (25461222), we get a palindrome (47677674).

The spelling of 22216452 in words is "twenty-two million, two hundred sixteen thousand, four hundred fifty-two".