22543425 has 18 divisors (see below), whose sum is σ = 40378182. Its totient is φ = 12023040.

The previous prime is 22543393. The next prime is 22543429. The reversal of 22543425 is 52434522.

It is a happy number.

22543425 is a `hidden beast` number, since 225 + 434 + 2 + 5 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 3594816 + 18948609 = 1896^2 + 4353^2 .

It is not a de Polignac number, because 22543425 - 2⁵ = 22543393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22543429) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 49872 + ... + 50321.

Almost surely, 2^22543425 is an apocalyptic number.

22543425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22543425 is a deficient number, since it is larger than the sum of its proper divisors (17834757).

22543425 is a wasteful number, since it uses less digits than its factorization.

22543425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100209 (or 100201 counting only the distinct ones).

The product of its digits is 9600, while the sum is 27.

The square root of 22543425 is about 4747.9916807004. The cubic root of 22543425 is about 282.4923119008.

Adding to 22543425 its reverse (52434522), we get a palindrome (74977947).

The spelling of 22543425 in words is "twenty-two million, five hundred forty-three thousand, four hundred twenty-five".