22561242 has 32 divisors (see below), whose sum is σ = 50817024. Its totient is φ = 6615600.

The previous prime is 22561219. The next prime is 22561243. The reversal of 22561242 is 24216522.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (22561243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3468 + ... + 7559.

It is an arithmetic number, because the mean of its divisors is an integer number (1588032).

Almost surely, 2^22561242 is an apocalyptic number.

22561242 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

22561242 is an abundant number, since it is smaller than the sum of its proper divisors (28255782).

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

22561242 is a wasteful number, since it uses less digits than its factorization.

22561242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11074.

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

The square root of 22561242 is about 4749.8675771015. The cubic root of 22561242 is about 282.5667140843.

Adding to 22561242 its reverse (24216522), we get a palindrome (46777764).

The spelling of 22561242 in words is "twenty-two million, five hundred sixty-one thousand, two hundred forty-two".