51101831871 has 24 divisors (see below), whose sum is σ = 78476332896. Its totient is φ = 31971825600.

The previous prime is 51101831861. The next prime is 51101831897. The reversal of 51101831871 is 17813810115.

It is not a de Polignac number, because 51101831871 - 2⁵ = 51101831839 is a prime.

It is a super-2 number, since 2×51101831871² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51101831861) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2317980 + ... + 2339921.

It is an arithmetic number, because the mean of its divisors is an integer number (3269847204).

Almost surely, 2^51101831871 is an apocalyptic number.

51101831871 is a deficient number, since it is larger than the sum of its proper divisors (27374501025).

51101831871 is a wasteful number, since it uses less digits than its factorization.

51101831871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4657983 (or 4657980 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 36.

The spelling of 51101831871 in words is "fifty-one billion, one hundred one million, eight hundred thirty-one thousand, eight hundred seventy-one".