51091875 has 60 divisors (see below), whose sum is σ = 95519424. Its totient is φ = 26280000.

The previous prime is 51091837. The next prime is 51091877. The reversal of 51091875 is 57819015.

51091875 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 51091875 - 2²¹ = 48994723 is a prime.

It is a super-2 number, since 2×51091875² = 5220759382031250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51091877) 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 59 ways as a sum of consecutive naturals, for example, 174229 + ... + 174521.

Almost surely, 2^51091875 is an apocalyptic number.

51091875 is a deficient number, since it is larger than the sum of its proper divisors (44427549).

51091875 is a wasteful number, since it uses less digits than its factorization.

51091875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350 (or 332 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 36.

The square root of 51091875 is about 7147.8580707790. The cubic root of 51091875 is about 371.0655309105.

The spelling of 51091875 in words is "fifty-one million, ninety-one thousand, eight hundred seventy-five".