517400336021 has 2 divisors, whose sum is σ = 517400336022. Its totient is φ = 517400336020.

The previous prime is 517400336003. The next prime is 517400336029. The reversal of 517400336021 is 120633004715.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 407318386225 + 110081949796 = 638215^2 + 331786^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-517400336021 is a prime.

It is a super-2 number, since 2×517400336021² (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 (517400336029) 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, 258700168010 + 258700168011.

It is an arithmetic number, because the mean of its divisors is an integer number (258700168011).

Almost surely, 2^517400336021 is an apocalyptic number.

It is an amenable number.

517400336021 is a deficient number, since it is larger than the sum of its proper divisors (1).

517400336021 is an equidigital number, since it uses as much as digits as its factorization.

517400336021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 32.

The spelling of 517400336021 in words is "five hundred seventeen billion, four hundred million, three hundred thirty-six thousand, twenty-one".