51851127171 has 4 divisors (see below), whose sum is σ = 69134836232. Its totient is φ = 34567418112.

The previous prime is 51851127121. The next prime is 51851127179. The reversal of 51851127171 is 17172115815.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 51851127171 - 2²² = 51846932867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51851127179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8641854526 + ... + 8641854531.

It is an arithmetic number, because the mean of its divisors is an integer number (17283709058).

Almost surely, 2^51851127171 is an apocalyptic number.

51851127171 is a deficient number, since it is larger than the sum of its proper divisors (17283709061).

51851127171 is a wasteful number, since it uses less digits than its factorization.

51851127171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17283709060.

The product of its digits is 19600, while the sum is 39.

The spelling of 51851127171 in words is "fifty-one billion, eight hundred fifty-one million, one hundred twenty-seven thousand, one hundred seventy-one".