22520000 has 70 divisors (see below), whose sum is σ = 55941468. Its totient is φ = 8992000.

The previous prime is 22519999. The next prime is 22520033. The reversal of 22520000 is 2522.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 39719 + ... + 40281.

Almost surely, 2^22520000 is an apocalyptic number.

22520000 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 22520000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27970734).

22520000 is an abundant number, since it is smaller than the sum of its proper divisors (33421468).

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

22520000 is an frugal number, since it uses more digits than its factorization.

22520000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595 (or 570 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 11.

The square root of 22520000 is about 4745.5242070819. The cubic root of 22520000 is about 282.3944315391.

Adding to 22520000 its reverse (2522), we get a palindrome (22522522).

The spelling of 22520000 in words is "twenty-two million, five hundred twenty thousand".