22245000 has 80 divisors (see below), whose sum is σ = 69540240. Its totient is φ = 5928000.

The previous prime is 22244941. The next prime is 22245017. The reversal of 22245000 is 54222.

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

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 14259 + ... + 15741.

It is an arithmetic number, because the mean of its divisors is an integer number (869253).

Almost surely, 2^22245000 is an apocalyptic number.

22245000 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 22245000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34770120).

22245000 is an abundant number, since it is smaller than the sum of its proper divisors (47295240).

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

22245000 is a wasteful number, since it uses less digits than its factorization.

22245000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1512 (or 1493 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 22245000 is about 4716.4605373097. The cubic root of 22245000 is about 281.2402465753.

Adding to 22245000 its reverse (54222), we get a palindrome (22299222).

The spelling of 22245000 in words is "twenty-two million, two hundred forty-five thousand".