40243012231 has 2 divisors, whose sum is σ = 40243012232. Its totient is φ = 40243012230.

The previous prime is 40243012177. The next prime is 40243012247. The reversal of 40243012231 is 13221034204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40243012231 - 2¹¹ = 40243010183 is a prime.

It is a super-2 number, since 2×40243012231² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40243012031) 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 as a sum of consecutive naturals, namely, 20121506115 + 20121506116.

It is an arithmetic number, because the mean of its divisors is an integer number (20121506116).

Almost surely, 2^40243012231 is an apocalyptic number.

40243012231 is a deficient number, since it is larger than the sum of its proper divisors (1).

40243012231 is an equidigital number, since it uses as much as digits as its factorization.

40243012231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 40243012231 its reverse (13221034204), we get a palindrome (53464046435).

The spelling of 40243012231 in words is "forty billion, two hundred forty-three million, twelve thousand, two hundred thirty-one".