503216551309 has 2 divisors, whose sum is σ = 503216551310. Its totient is φ = 503216551308.

The previous prime is 503216551303. The next prime is 503216551361. The reversal of 503216551309 is 903155612305.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 259004655625 + 244211895684 = 508925^2 + 494178^2 .

It is a cyclic number.

It is not a de Polignac number, because 503216551309 - 2⁹ = 503216550797 is a prime.

It is a super-2 number, since 2×503216551309² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (503216551303) 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, 251608275654 + 251608275655.

It is an arithmetic number, because the mean of its divisors is an integer number (251608275655).

Almost surely, 2^503216551309 is an apocalyptic number.

It is an amenable number.

503216551309 is a deficient number, since it is larger than the sum of its proper divisors (1).

503216551309 is an equidigital number, since it uses as much as digits as its factorization.

503216551309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 121500, while the sum is 40.

The spelling of 503216551309 in words is "five hundred three billion, two hundred sixteen million, five hundred fifty-one thousand, three hundred nine".