40243430431 has 2 divisors, whose sum is σ = 40243430432. Its totient is φ = 40243430430.

The previous prime is 40243430399. The next prime is 40243430449. The reversal of 40243430431 is 13403434204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40243430431 - 2⁵ = 40243430399 is a prime.

It is a super-2 number, since 2×40243430431² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40243430431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40243430231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20121715215 + 20121715216.

It is an arithmetic number, because the mean of its divisors is an integer number (20121715216).

Almost surely, 2^40243430431 is an apocalyptic number.

40243430431 is a deficient number, since it is larger than the sum of its proper divisors (1).

40243430431 is an equidigital number, since it uses as much as digits as its factorization.

40243430431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 40243430431 its reverse (13403434204), we get a palindrome (53646864635).

The spelling of 40243430431 in words is "forty billion, two hundred forty-three million, four hundred thirty thousand, four hundred thirty-one".