51000516517 has 8 divisors (see below), whose sum is σ = 52255488600. Its totient is φ = 49746071040.

The previous prime is 51000516493. The next prime is 51000516569. The reversal of 51000516517 is 71561500015.

It can be written as a sum of positive squares in 4 ways, for example, as 309795201 + 50690721316 = 17601^2 + 225146^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51000516517 is a prime.

It is a super-2 number, since 2×51000516517² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51000513517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68109 + ... + 326557.

It is an arithmetic number, because the mean of its divisors is an integer number (6531936075).

Almost surely, 2^51000516517 is an apocalyptic number.

It is an amenable number.

51000516517 is a deficient number, since it is larger than the sum of its proper divisors (1254972083).

51000516517 is a wasteful number, since it uses less digits than its factorization.

51000516517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263303.

The product of its (nonzero) digits is 5250, while the sum is 31.

The spelling of 51000516517 in words is "fifty-one billion, five hundred sixteen thousand, five hundred seventeen".