40043215243 has 4 divisors (see below), whose sum is σ = 40640875240. Its totient is φ = 39445555248.

The previous prime is 40043215229. The next prime is 40043215259. The reversal of 40043215243 is 34251234004.

It is a happy number.

40043215243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 40043215243 - 2¹³ = 40043207051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40043215273) 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, 298829898 + ... + 298830031.

It is an arithmetic number, because the mean of its divisors is an integer number (10160218810).

Almost surely, 2^40043215243 is an apocalyptic number.

40043215243 is a deficient number, since it is larger than the sum of its proper divisors (597659997).

40043215243 is an equidigital number, since it uses as much as digits as its factorization.

40043215243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597659996.

The product of its (nonzero) digits is 11520, while the sum is 28.

Adding to 40043215243 its reverse (34251234004), we get a palindrome (74294449247).

The spelling of 40043215243 in words is "forty billion, forty-three million, two hundred fifteen thousand, two hundred forty-three".