51885 has 12 divisors (see below), whose sum is σ = 90012. Its totient is φ = 27648.

The previous prime is 51871. The next prime is 51893. The reversal of 51885 is 58815.

It can be written as a sum of positive squares in 2 ways, for example, as 30276 + 21609 = 174^2 + 147^2 .

It is not a de Polignac number, because 51885 - 2⁴ = 51869 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 532 + ... + 621.

It is an arithmetic number, because the mean of its divisors is an integer number (7501).

2⁵¹⁸⁸⁵ is an apocalyptic number.

It is an amenable number.

51885 is a deficient number, since it is larger than the sum of its proper divisors (38127).

51885 is a wasteful number, since it uses less digits than its factorization.

51885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1164 (or 1161 counting only the distinct ones).

The product of its digits is 1600, while the sum is 27.

The square root of 51885 is about 227.7827912727. The cubic root of 51885 is about 37.2975759529.

The spelling of 51885 in words is "fifty-one thousand, eight hundred eighty-five".