517020335532021 has 16 divisors (see below), whose sum is σ = 696691635273920. Its totient is φ = 341023782286080.

The previous prime is 517020335532007. The next prime is 517020335532049. The reversal of 517020335532021 is 120235533020715.

It is not a de Polignac number, because 517020335532021 - 2⁶ = 517020335531957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (517020335532721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1143842020 + ... + 1144293933.

It is an arithmetic number, because the mean of its divisors is an integer number (43543227204620).

Almost surely, 2^{517020335532021} is an apocalyptic number.

It is an amenable number.

517020335532021 is a deficient number, since it is larger than the sum of its proper divisors (179671299741899).

517020335532021 is a wasteful number, since it uses less digits than its factorization.

517020335532021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2288136756.

The product of its (nonzero) digits is 189000, while the sum is 39.

Adding to 517020335532021 its reverse (120235533020715), we get a palindrome (637255868552736).

The spelling of 517020335532021 in words is "five hundred seventeen trillion, twenty billion, three hundred thirty-five million, five hundred thirty-two thousand, twenty-one".