43042040003 has 4 divisors (see below), whose sum is σ = 43525658520. Its totient is φ = 42558421488.

The previous prime is 43042039991. The next prime is 43042040123. The reversal of 43042040003 is 30004024034.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43042040003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43042040803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 241809125 + ... + 241809302.

It is an arithmetic number, because the mean of its divisors is an integer number (10881414630).

Almost surely, 2^43042040003 is an apocalyptic number.

43042040003 is a deficient number, since it is larger than the sum of its proper divisors (483618517).

43042040003 is an equidigital number, since it uses as much as digits as its factorization.

43042040003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483618516.

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

Adding to 43042040003 its reverse (30004024034), we get a palindrome (73046064037).

The spelling of 43042040003 in words is "forty-three billion, forty-two million, forty thousand, three".