40243312231 has 4 divisors (see below), whose sum is σ = 40251819672. Its totient is φ = 40234804792.

The previous prime is 40243312229. The next prime is 40243312247. The reversal of 40243312231 is 13221334204.

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 40243312231 - 2¹ = 40243312229 is a prime.

It is a super-2 number, since 2×40243312231² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40243312196 and 40243312205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40243312201) 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, 4246621 + ... + 4256086.

It is an arithmetic number, because the mean of its divisors is an integer number (10062954918).

Almost surely, 2^40243312231 is an apocalyptic number.

40243312231 is a deficient number, since it is larger than the sum of its proper divisors (8507441).

40243312231 is an equidigital number, since it uses as much as digits as its factorization.

40243312231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8507440.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 40243312231 its reverse (13221334204), we get a palindrome (53464646435).

The spelling of 40243312231 in words is "forty billion, two hundred forty-three million, three hundred twelve thousand, two hundred thirty-one".