22001200 has 60 divisors (see below), whose sum is σ = 56937328. Its totient is φ = 8121600.

The previous prime is 22001197. The next prime is 22001207. The reversal of 22001200 is 210022.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (22001207) 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 11 ways as a sum of consecutive naturals, for example, 3085 + ... + 7315.

Almost surely, 2^22001200 is an apocalyptic number.

22001200 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 22001200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28468664).

22001200 is an abundant number, since it is smaller than the sum of its proper divisors (34936128).

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

22001200 is a wasteful number, since it uses less digits than its factorization.

22001200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4262 (or 4251 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 22001200 is about 4690.5436785089. The cubic root of 22001200 is about 280.2090275899.

Adding to 22001200 its reverse (210022), we get a palindrome (22211222).

It can be divided in two parts, 22001 and 200, that added together give a square (22201 = 149²).

The spelling of 22001200 in words is "twenty-two million, one thousand, two hundred".