40013204243 has 4 divisors (see below), whose sum is σ = 40165345968. Its totient is φ = 39861062520.

The previous prime is 40013204191. The next prime is 40013204267. The reversal of 40013204243 is 34240231004.

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 40013204243 - 2¹⁴ = 40013187859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40013204293) 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, 76070468 + ... + 76070993.

It is an arithmetic number, because the mean of its divisors is an integer number (10041336492).

Almost surely, 2^40013204243 is an apocalyptic number.

40013204243 is a deficient number, since it is larger than the sum of its proper divisors (152141725).

40013204243 is a wasteful number, since it uses less digits than its factorization.

40013204243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152141724.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 40013204243 its reverse (34240231004), we get a palindrome (74253435247).

The spelling of 40013204243 in words is "forty billion, thirteen million, two hundred four thousand, two hundred forty-three".