517123207504023 has 32 divisors (see below), whose sum is σ = 731250922659840. Its totient is φ = 323938538849280.

The previous prime is 517123207504021. The next prime is 517123207504039. The reversal of 517123207504023 is 320405702321715.

It is not a de Polignac number, because 517123207504023 - 2¹ = 517123207504021 is a prime.

It is a super-2 number, since 2×517123207504023² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (517123207504021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1827103786 + ... + 1827386792.

It is an arithmetic number, because the mean of its divisors is an integer number (22851591333120).

Almost surely, 2^{517123207504023} is an apocalyptic number.

517123207504023 is a deficient number, since it is larger than the sum of its proper divisors (214127715155817).

517123207504023 is a wasteful number, since it uses less digits than its factorization.

517123207504023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341527.

The product of its (nonzero) digits is 352800, while the sum is 42.

Adding to 517123207504023 its reverse (320405702321715), we get a palindrome (837528909825738).

The spelling of 517123207504023 in words is "five hundred seventeen trillion, one hundred twenty-three billion, two hundred seven million, five hundred four thousand, twenty-three".