43000040243 has 4 divisors (see below), whose sum is σ = 43001200440. Its totient is φ = 42998880048.

The previous prime is 43000040143. The next prime is 43000040269. The reversal of 43000040243 is 34204000034.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 43000040243 - 2¹⁰ = 43000039219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43000040143) 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, 522605 + ... + 599262.

It is an arithmetic number, because the mean of its divisors is an integer number (10750300110).

Almost surely, 2^43000040243 is an apocalyptic number.

43000040243 is a deficient number, since it is larger than the sum of its proper divisors (1160197).

43000040243 is a wasteful number, since it uses less digits than its factorization.

43000040243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1160196.

The product of its (nonzero) digits is 1152, while the sum is 20.

Adding to 43000040243 its reverse (34204000034), we get a palindrome (77204040277).

The spelling of 43000040243 in words is "forty-three billion, forty thousand, two hundred forty-three".