22242012 has 48 divisors (see below), whose sum is σ = 58329600. Its totient is φ = 6545088.

The previous prime is 22241987. The next prime is 22242019. The reversal of 22242012 is 21024222.

It is a junction number, because it is equal to n+sod(n) for n = 22241982 and 22242000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22242019) 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 15 ways as a sum of consecutive naturals, for example, 489 + ... + 6687.

It is an arithmetic number, because the mean of its divisors is an integer number (1215200).

Almost surely, 2^22242012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22242012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29164800).

22242012 is an abundant number, since it is smaller than the sum of its proper divisors (36087588).

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

22242012 is a wasteful number, since it uses less digits than its factorization.

22242012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6242 (or 6240 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 22242012 is about 4716.1437637120. The cubic root of 22242012 is about 281.2276537307.

Adding to 22242012 its reverse (21024222), we get a palindrome (43266234).

The spelling of 22242012 in words is "twenty-two million, two hundred forty-two thousand, twelve".