22555530 has 64 divisors (see below), whose sum is σ = 60681600. Its totient is φ = 5961600.

The previous prime is 22555529. The next prime is 22555531. The reversal of 22555530 is 3555522.

It is an interprime number because it is at equal distance from previous prime (22555529) and next prime (22555531).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22555494 and 22555503.

It is not an unprimeable number, because it can be changed into a prime (22555531) 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 31 ways as a sum of consecutive naturals, for example, 37230 + ... + 37830.

It is an arithmetic number, because the mean of its divisors is an integer number (948150).

Almost surely, 2^22555530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22555530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30340800).

22555530 is an abundant number, since it is smaller than the sum of its proper divisors (38126070).

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

22555530 is a wasteful number, since it uses less digits than its factorization.

22555530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756 (or 750 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 27.

The square root of 22555530 is about 4749.2662591183. The cubic root of 22555530 is about 282.5428655553.

It can be divided in two parts, 225 and 55530, that added together give a palindrome (55755).

The spelling of 22555530 in words is "twenty-two million, five hundred fifty-five thousand, five hundred thirty".