51086889 has 32 divisors (see below), whose sum is σ = 87171840. Its totient is φ = 28964736.

The previous prime is 51086879. The next prime is 51086891. The reversal of 51086889 is 98868015.

It is not a de Polignac number, because 51086889 - 2⁴ = 51086873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51086879) 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 31 ways as a sum of consecutive naturals, for example, 24907 + ... + 26879.

It is an arithmetic number, because the mean of its divisors is an integer number (2724120).

Almost surely, 2^51086889 is an apocalyptic number.

It is an amenable number.

51086889 is a deficient number, since it is larger than the sum of its proper divisors (36084951).

51086889 is a wasteful number, since it uses less digits than its factorization.

51086889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2126 (or 2120 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The square root of 51086889 is about 7147.5092864578. The cubic root of 51086889 is about 371.0534598919.

The spelling of 51086889 in words is "fifty-one million, eighty-six thousand, eight hundred eighty-nine".