43641225 has 36 divisors (see below), whose sum is σ = 79266876. Its totient is φ = 22947840.

The previous prime is 43641223. The next prime is 43641229. The reversal of 43641225 is 52214634.

43641225 is a `hidden beast` number, since 436 + 4 + 1 + 225 = 666.

43641225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 41616 + 43599609 = 204^2 + 6603^2 .

It is not a de Polignac number, because 43641225 - 2¹ = 43641223 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (43641223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 15097 + ... + 17753.

Almost surely, 2^43641225 is an apocalyptic number.

43641225 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

43641225 is a deficient number, since it is larger than the sum of its proper divisors (35625651).

43641225 is a wasteful number, since it uses less digits than its factorization.

43641225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2746 (or 2738 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 43641225 is about 6606.1505432438. The cubic root of 43641225 is about 352.0726676118.

Adding to 43641225 its reverse (52214634), we get a palindrome (95855859).

The spelling of 43641225 in words is "forty-three million, six hundred forty-one thousand, two hundred twenty-five".