51171895 has 16 divisors (see below), whose sum is σ = 65644992. Its totient is φ = 38199040.

The previous prime is 51171893. The next prime is 51171943. The reversal of 51171895 is 59817115.

51171895 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51171895 - 2¹ = 51171893 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 (51171893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 712 + ... + 10141.

It is an arithmetic number, because the mean of its divisors is an integer number (4102812).

Almost surely, 2^51171895 is an apocalyptic number.

51171895 is a deficient number, since it is larger than the sum of its proper divisors (14473097).

51171895 is a wasteful number, since it uses less digits than its factorization.

51171895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10922.

The product of its digits is 12600, while the sum is 37.

The square root of 51171895 is about 7153.4533618386. The cubic root of 51171895 is about 371.2591505792.

The spelling of 51171895 in words is "fifty-one million, one hundred seventy-one thousand, eight hundred ninety-five".