503040116321 has 2 divisors, whose sum is σ = 503040116322. Its totient is φ = 503040116320.

The previous prime is 503040116291. The next prime is 503040116323. The reversal of 503040116321 is 123611040305.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 397102885921 + 105937230400 = 630161^2 + 325480^2 .

It is a cyclic number.

It is not a de Polignac number, because 503040116321 - 2¹⁰ = 503040115297 is a prime.

Together with 503040116323, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (503040116323) 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, 251520058160 + 251520058161.

It is an arithmetic number, because the mean of its divisors is an integer number (251520058161).

Almost surely, 2^503040116321 is an apocalyptic number.

It is an amenable number.

503040116321 is a deficient number, since it is larger than the sum of its proper divisors (1).

503040116321 is an equidigital number, since it uses as much as digits as its factorization.

503040116321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 26.

Adding to 503040116321 its reverse (123611040305), we get a palindrome (626651156626).

The spelling of 503040116321 in words is "five hundred three billion, forty million, one hundred sixteen thousand, three hundred twenty-one".