22025520 has 240 divisors, whose sum is σ = 84494592. Its totient is φ = 5287680.

The previous prime is 22025473. The next prime is 22025527. The reversal of 22025520 is 2552022.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 22025493 and 22025502.

It is not an unprimeable number, because it can be changed into a prime (22025527) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 213789 + ... + 213891.

Almost surely, 2^22025520 is an apocalyptic number.

22025520 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 22025520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42247296).

22025520 is an abundant number, since it is smaller than the sum of its proper divisors (62469072).

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

22025520 is a wasteful number, since it uses less digits than its factorization.

22025520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 22025520 is about 4693.1354124934. The cubic root of 22025520 is about 280.3122367197.

Adding to 22025520 its reverse (2552022), we get a palindrome (24577542).

The spelling of 22025520 in words is "twenty-two million, twenty-five thousand, five hundred twenty".