43440213 has 12 divisors (see below), whose sum is σ = 61130688. Its totient is φ = 27435240.

The previous prime is 43440209. The next prime is 43440239. The reversal of 43440213 is 31204434.

43440213 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 43440213 - 2² = 43440209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43440213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43440203) 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 11 ways as a sum of consecutive naturals, for example, 18973 + ... + 21138.

It is an arithmetic number, because the mean of its divisors is an integer number (5094224).

Almost surely, 2^43440213 is an apocalyptic number.

It is an amenable number.

43440213 is a deficient number, since it is larger than the sum of its proper divisors (17690475).

43440213 is a wasteful number, since it uses less digits than its factorization.

43440213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40152 (or 40133 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 43440213 is about 6590.9189799299. The cubic root of 43440213 is about 351.5312852602.

Adding to 43440213 its reverse (31204434), we get a palindrome (74644647).

The spelling of 43440213 in words is "forty-three million, four hundred forty thousand, two hundred thirteen".