51188871 has 16 divisors (see below), whose sum is σ = 71153024. Its totient is φ = 32703264.

The previous prime is 51188867. The next prime is 51188881. The reversal of 51188871 is 17888115.

It is not a de Polignac number, because 51188871 - 2² = 51188867 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 (51188881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3996 + ... + 10878.

It is an arithmetic number, because the mean of its divisors is an integer number (4447064).

Almost surely, 2^51188871 is an apocalyptic number.

51188871 is a deficient number, since it is larger than the sum of its proper divisors (19964153).

51188871 is a wasteful number, since it uses less digits than its factorization.

51188871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6990.

The product of its digits is 17920, while the sum is 39.

The square root of 51188871 is about 7154.6398232196. The cubic root of 51188871 is about 371.3002004467.

The spelling of 51188871 in words is "fifty-one million, one hundred eighty-eight thousand, eight hundred seventy-one".