517011513913 has 2 divisors, whose sum is σ = 517011513914. Its totient is φ = 517011513912.

The previous prime is 517011513877. The next prime is 517011513923. The reversal of 517011513913 is 319315110715.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 362744812089 + 154266701824 = 602283^2 + 392768^2 .

It is a cyclic number.

It is not a de Polignac number, because 517011513913 - 2³³ = 508421579321 is a prime.

It is a super-2 number, since 2×517011513913² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (517011513923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258505756956 + 258505756957.

It is an arithmetic number, because the mean of its divisors is an integer number (258505756957).

Almost surely, 2^517011513913 is an apocalyptic number.

It is an amenable number.

517011513913 is a deficient number, since it is larger than the sum of its proper divisors (1).

517011513913 is an equidigital number, since it uses as much as digits as its factorization.

517011513913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14175, while the sum is 37.

The spelling of 517011513913 in words is "five hundred seventeen billion, eleven million, five hundred thirteen thousand, nine hundred thirteen".