43140043 has 4 divisors (see below), whose sum is σ = 43162168. Its totient is φ = 43117920.

The previous prime is 43140037. The next prime is 43140079. The reversal of 43140043 is 34004134.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34004134 = 2 ⋅17002067.

It is a cyclic number.

It is not a de Polignac number, because 43140043 - 2⁵ = 43140011 is a prime.

It is a super-2 number, since 2×43140043² = 3722126620083698, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 43140043.

It is not an unprimeable number, because it can be changed into a prime (43140443) 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, 7821 + ... + 12142.

It is an arithmetic number, because the mean of its divisors is an integer number (10790542).

Almost surely, 2^43140043 is an apocalyptic number.

43140043 is a deficient number, since it is larger than the sum of its proper divisors (22125).

43140043 is a wasteful number, since it uses less digits than its factorization.

43140043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22124.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 43140043 is about 6568.1080228632. The cubic root of 43140043 is about 350.7197244184.

Adding to 43140043 its reverse (34004134), we get a palindrome (77144177).

The spelling of 43140043 in words is "forty-three million, one hundred forty thousand, forty-three".