40043243001 has 4 divisors (see below), whose sum is σ = 53390990672. Its totient is φ = 26695495332.

The previous prime is 40043242991. The next prime is 40043243039. The reversal of 40043243001 is 10034234004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 40043243001 - 2⁷ = 40043242873 is a prime.

It is a super-2 number, since 2×40043243001² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40043243101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6673873831 + ... + 6673873836.

It is an arithmetic number, because the mean of its divisors is an integer number (13347747668).

Almost surely, 2^40043243001 is an apocalyptic number.

It is an amenable number.

40043243001 is a deficient number, since it is larger than the sum of its proper divisors (13347747671).

40043243001 is a wasteful number, since it uses less digits than its factorization.

40043243001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13347747670.

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 40043243001 its reverse (10034234004), we get a palindrome (50077477005).

The spelling of 40043243001 in words is "forty billion, forty-three million, two hundred forty-three thousand, one".