43043213 has 4 divisors (see below), whose sum is σ = 43058940. Its totient is φ = 43027488.

The previous prime is 43043207. The next prime is 43043243. The reversal of 43043213 is 31234034.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16024009 + 27019204 = 4003^2 + 5198^2 .

It is a cyclic number.

It is not a de Polignac number, because 43043213 - 2⁴ = 43043197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43043243) 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 3 ways as a sum of consecutive naturals, for example, 2570 + ... + 9627.

It is an arithmetic number, because the mean of its divisors is an integer number (10764735).

Almost surely, 2^43043213 is an apocalyptic number.

It is an amenable number.

43043213 is a deficient number, since it is larger than the sum of its proper divisors (15727).

43043213 is a wasteful number, since it uses less digits than its factorization.

43043213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15726.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 43043213 is about 6560.7326572571. The cubic root of 43043213 is about 350.4571251508.

Adding to 43043213 its reverse (31234034), we get a palindrome (74277247).

The spelling of 43043213 in words is "forty-three million, forty-three thousand, two hundred thirteen".