43431243 has 16 divisors (see below), whose sum is σ = 62622720. Its totient is φ = 26669696.

The previous prime is 43431233. The next prime is 43431251. The reversal of 43431243 is 34213434.

It is a cyclic number.

It is not a de Polignac number, because 43431243 - 2⁸ = 43430987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (43431203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6663 + ... + 11456.

It is an arithmetic number, because the mean of its divisors is an integer number (3913920).

Almost surely, 2^43431243 is an apocalyptic number.

43431243 is a deficient number, since it is larger than the sum of its proper divisors (19191477).

43431243 is a wasteful number, since it uses less digits than its factorization.

43431243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18186.

The product of its digits is 3456, while the sum is 24.

The square root of 43431243 is about 6590.2384630603. The cubic root of 43431243 is about 351.5070876142.

Adding to 43431243 its reverse (34213434), we get a palindrome (77644677).

The spelling of 43431243 in words is "forty-three million, four hundred thirty-one thousand, two hundred forty-three".