43212225 has 48 divisors (see below), whose sum is σ = 83244672. Its totient is φ = 19368960.

The previous prime is 43212199. The next prime is 43212229. The reversal of 43212225 is 52221234.

43212225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 43212225 - 2⁷ = 43212097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (43212229) 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 47 ways as a sum of consecutive naturals, for example, 27049 + ... + 28601.

It is an arithmetic number, because the mean of its divisors is an integer number (1734264).

Almost surely, 2^43212225 is an apocalyptic number.

It is an amenable number.

43212225 is a deficient number, since it is larger than the sum of its proper divisors (40032447).

43212225 is a wasteful number, since it uses less digits than its factorization.

43212225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1626 (or 1621 counting only the distinct ones).

The product of its digits is 960, while the sum is 21.

The square root of 43212225 is about 6573.6006115370. The cubic root of 43212225 is about 350.9152237203.

Adding to 43212225 its reverse (52221234), we get a palindrome (95433459).

Subtracting 43212225 from its reverse (52221234), we obtain a palindrome (9009009).

The spelling of 43212225 in words is "forty-three million, two hundred twelve thousand, two hundred twenty-five".