22551328 has 48 divisors (see below), whose sum is σ = 48384000. Its totient is φ = 10305792.

The previous prime is 22551317. The next prime is 22551343. The reversal of 22551328 is 82315522.

It is a junction number, because it is equal to n+sod(n) for n = 22551296 and 22551305.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16993 + ... + 18271.

It is an arithmetic number, because the mean of its divisors is an integer number (1008000).

Almost surely, 2^22551328 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 22551328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24192000).

22551328 is an abundant number, since it is smaller than the sum of its proper divisors (25832672).

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

22551328 is a wasteful number, since it uses less digits than its factorization.

22551328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1337 (or 1329 counting only the distinct ones).

The product of its digits is 4800, while the sum is 28.

The square root of 22551328 is about 4748.8238543875. The cubic root of 22551328 is about 282.5253189514.

The spelling of 22551328 in words is "twenty-two million, five hundred fifty-one thousand, three hundred twenty-eight".