22143300 has 72 divisors (see below), whose sum is σ = 66162432. Its totient is φ = 5712000.

The previous prime is 22143293. The next prime is 22143301. The reversal of 22143300 is 334122.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 22143300.

It is not an unprimeable number, because it can be changed into a prime (22143301) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8110 + ... + 10490.

Almost surely, 2^22143300 is an apocalyptic number.

22143300 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 22143300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33081216).

22143300 is an abundant number, since it is smaller than the sum of its proper divisors (44019132).

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

22143300 is a wasteful number, since it uses less digits than its factorization.

22143300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2429 (or 2422 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 22143300 is about 4705.6667965337. Note that the first 3 decimals coincide. The cubic root of 22143300 is about 280.8109990740.

Adding to 22143300 its reverse (334122), we get a palindrome (22477422).

The spelling of 22143300 in words is "twenty-two million, one hundred forty-three thousand, three hundred".