51887 has 8 divisors (see below), whose sum is σ = 58320. Its totient is φ = 45760.

The previous prime is 51871. The next prime is 51893. The reversal of 51887 is 78815.

It is a happy number.

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

It is not a de Polignac number, because 51887 - 2⁴ = 51871 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 (51817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 539 + ... + 627.

It is an arithmetic number, because the mean of its divisors is an integer number (7290).

2⁵¹⁸⁸⁷ is an apocalyptic number.

51887 is a deficient number, since it is larger than the sum of its proper divisors (6433).

51887 is a wasteful number, since it uses less digits than its factorization.

51887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153.

The product of its digits is 2240, while the sum is 29.

The square root of 51887 is about 227.7871813777. The cubic root of 51887 is about 37.2980551806.

The spelling of 51887 in words is "fifty-one thousand, eight hundred eighty-seven".