22255500 has 96 divisors (see below), whose sum is σ = 66725568. Its totient is φ = 5760000.

The previous prime is 22255483. The next prime is 22255507. The reversal of 22255500 is 555222.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22255507) 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 31 ways as a sum of consecutive naturals, for example, 55300 + ... + 55700.

It is an arithmetic number, because the mean of its divisors is an integer number (695058).

Almost surely, 2^22255500 is an apocalyptic number.

22255500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22255500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33362784).

22255500 is an abundant number, since it is smaller than the sum of its proper divisors (44470068).

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

22255500 is a wasteful number, since it uses less digits than its factorization.

22255500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460 (or 448 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 21.

The square root of 22255500 is about 4717.5735288387. The cubic root of 22255500 is about 281.2844895975.

The spelling of 22255500 in words is "twenty-two million, two hundred fifty-five thousand, five hundred".