22543225 has 12 divisors (see below), whose sum is σ = 28061820. Its totient is φ = 17964800.

The previous prime is 22543219. The next prime is 22543259. The reversal of 22543225 is 52234522.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 9216 + 22534009 = 96^2 + 4747^2 .

It is not a de Polignac number, because 22543225 - 2¹³ = 22535033 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 22543225.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5421 + ... + 8629.

It is an arithmetic number, because the mean of its divisors is an integer number (2338485).

Almost surely, 2^22543225 is an apocalyptic number.

22543225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22543225 is a deficient number, since it is larger than the sum of its proper divisors (5518595).

22543225 is a wasteful number, since it uses less digits than its factorization.

22543225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3500 (or 3495 counting only the distinct ones).

The product of its digits is 4800, while the sum is 25.

The square root of 22543225 is about 4747.9706191172. The cubic root of 22543225 is about 282.4914764964.

Adding to 22543225 its reverse (52234522), we get a palindrome (74777747).

The spelling of 22543225 in words is "twenty-two million, five hundred forty-three thousand, two hundred twenty-five".