42431320523 has 2 divisors, whose sum is σ = 42431320524. Its totient is φ = 42431320522.

The previous prime is 42431320453. The next prime is 42431320549. The reversal of 42431320523 is 32502313424.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42431320523 - 2¹⁰ = 42431319499 is a prime.

It is a super-2 number, since 2×42431320523² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (42431320553) 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, 21215660261 + 21215660262.

It is an arithmetic number, because the mean of its divisors is an integer number (21215660262).

Almost surely, 2^42431320523 is an apocalyptic number.

42431320523 is a deficient number, since it is larger than the sum of its proper divisors (1).

42431320523 is an equidigital number, since it uses as much as digits as its factorization.

42431320523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 29.

Adding to 42431320523 its reverse (32502313424), we get a palindrome (74933633947).

The spelling of 42431320523 in words is "forty-two billion, four hundred thirty-one million, three hundred twenty thousand, five hundred twenty-three".