43531243 has 4 divisors (see below), whose sum is σ = 49750000. Its totient is φ = 37312488.

The previous prime is 43531231. The next prime is 43531273. The reversal of 43531243 is 34213534.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34213534 = 2 ⋅17106767.

It is a cyclic number.

It is not a de Polignac number, because 43531243 - 2¹⁷ = 43400171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43531273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3109368 + ... + 3109381.

It is an arithmetic number, because the mean of its divisors is an integer number (12437500).

Almost surely, 2^43531243 is an apocalyptic number.

43531243 is a deficient number, since it is larger than the sum of its proper divisors (6218757).

43531243 is an equidigital number, since it uses as much as digits as its factorization.

43531243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6218756.

The product of its digits is 4320, while the sum is 25.

The square root of 43531243 is about 6597.8210797202. The cubic root of 43531243 is about 351.7766613338.

Adding to 43531243 its reverse (34213534), we get a palindrome (77744777).

The spelling of 43531243 in words is "forty-three million, five hundred thirty-one thousand, two hundred forty-three".