51095891 has 8 divisors (see below), whose sum is σ = 63704064. Its totient is φ = 39814920.

The previous prime is 51095873. The next prime is 51095893. The reversal of 51095891 is 19859015.

51095891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 51095891 - 2¹⁰ = 51094867 is a prime.

It is a super-2 number, since 2×51095891² = 5221580154167762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51095893) 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 7 ways as a sum of consecutive naturals, for example, 331715 + ... + 331868.

It is an arithmetic number, because the mean of its divisors is an integer number (7963008).

Almost surely, 2^51095891 is an apocalyptic number.

51095891 is a deficient number, since it is larger than the sum of its proper divisors (12608173).

51095891 is a wasteful number, since it uses less digits than its factorization.

51095891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663601.

The product of its (nonzero) digits is 16200, while the sum is 38.

The square root of 51095891 is about 7148.1389885760. The cubic root of 51095891 is about 371.0752530051.

The spelling of 51095891 in words is "fifty-one million, ninety-five thousand, eight hundred ninety-one".