505513400324243 has 2 divisors, whose sum is σ = 505513400324244. Its totient is φ = 505513400324242.

The previous prime is 505513400324197. The next prime is 505513400324287. The reversal of 505513400324243 is 342423004315505.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505513400324243 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 505513400324243.

It is not a weakly prime, because it can be changed into another prime (505513400324743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252756700162121 + 252756700162122.

It is an arithmetic number, because the mean of its divisors is an integer number (252756700162122).

Almost surely, 2^{505513400324243} is an apocalyptic number.

505513400324243 is a deficient number, since it is larger than the sum of its proper divisors (1).

505513400324243 is an equidigital number, since it uses as much as digits as its factorization.

505513400324243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864000, while the sum is 41.

Adding to 505513400324243 its reverse (342423004315505), we get a palindrome (847936404639748).

The spelling of 505513400324243 in words is "five hundred five trillion, five hundred thirteen billion, four hundred million, three hundred twenty-four thousand, two hundred forty-three".