505240542431 has 2 divisors, whose sum is σ = 505240542432. Its totient is φ = 505240542430.

The previous prime is 505240542379. The next prime is 505240542467. The reversal of 505240542431 is 134245042505.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 505240542431 - 2¹⁴ = 505240526047 is a prime.

It is a super-2 number, since 2×505240542431² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 505240542391 and 505240542400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505240542491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252620271215 + 252620271216.

It is an arithmetic number, because the mean of its divisors is an integer number (252620271216).

Almost surely, 2^505240542431 is an apocalyptic number.

505240542431 is a deficient number, since it is larger than the sum of its proper divisors (1).

505240542431 is an equidigital number, since it uses as much as digits as its factorization.

505240542431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96000, while the sum is 35.

Adding to 505240542431 its reverse (134245042505), we get a palindrome (639485584936).

The spelling of 505240542431 in words is "five hundred five billion, two hundred forty million, five hundred forty-two thousand, four hundred thirty-one".