51100217517 has 8 divisors (see below), whose sum is σ = 68143388896. Its totient is φ = 34061928912.

The previous prime is 51100217513. The next prime is 51100217573. The reversal of 51100217517 is 71571200115.

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

It is not a de Polignac number, because 51100217517 - 2² = 51100217513 is a prime.

It is a super-2 number, since 2×51100217517² (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 (51100217513) 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, 1196203 + ... + 1238184.

It is an arithmetic number, because the mean of its divisors is an integer number (8517923612).

Almost surely, 2^51100217517 is an apocalyptic number.

It is an amenable number.

51100217517 is a deficient number, since it is larger than the sum of its proper divisors (17043171379).

51100217517 is a wasteful number, since it uses less digits than its factorization.

51100217517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2441387.

The product of its (nonzero) digits is 2450, while the sum is 30.

The spelling of 51100217517 in words is "fifty-one billion, one hundred million, two hundred seventeen thousand, five hundred seventeen".