22775500 has 96 divisors (see below), whose sum is σ = 56137536. Its totient is φ = 8000000.

The previous prime is 22775491. The next prime is 22775507. The reversal of 22775500 is 557722.

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

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 (22775507) 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, 225450 + ... + 225550.

It is an arithmetic number, because the mean of its divisors is an integer number (584766).

Almost surely, 2^22775500 is an apocalyptic number.

22775500 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 22775500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28068768).

22775500 is an abundant number, since it is smaller than the sum of its proper divisors (33362036).

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

22775500 is a wasteful number, since it uses less digits than its factorization.

22775500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172 (or 160 counting only the distinct ones).

The product of its (nonzero) digits is 4900, while the sum is 28.

The square root of 22775500 is about 4772.3683847750. The cubic root of 22775500 is about 283.4583838621.

It can be divided in two parts, 2277 and 5500, that added together give a palindrome (7777).

The spelling of 22775500 in words is "twenty-two million, seven hundred seventy-five thousand, five hundred".