43545625 has 30 divisors (see below), whose sum is σ = 57726834. Its totient is φ = 32832000.

The previous prime is 43545611. The next prime is 43545629. The reversal of 43545625 is 52654534.

It can be written as a sum of positive squares in 5 ways, for example, as 22924944 + 20620681 = 4788^2 + 4541^2 .

It is not a de Polignac number, because 43545625 - 2¹⁵ = 43512857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43545629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 225529 + ... + 225721.

Almost surely, 2^43545625 is an apocalyptic number.

It is an amenable number.

43545625 is a deficient number, since it is larger than the sum of its proper divisors (14181209).

43545625 is an equidigital number, since it uses as much as digits as its factorization.

43545625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251 (or 217 counting only the distinct ones).

The product of its digits is 72000, while the sum is 34.

The square root of 43545625 is about 6598.9108949887. The cubic root of 43545625 is about 351.8153974578.

The spelling of 43545625 in words is "forty-three million, five hundred forty-five thousand, six hundred twenty-five".