51889 has 4 divisors (see below), whose sum is σ = 54640. Its totient is φ = 49140.

The previous prime is 51871. The next prime is 51893. The reversal of 51889 is 98815.

51889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98815 = 5 ⋅19763.

It is a cyclic number.

It is not a de Polignac number, because 51889 - 2¹⁵ = 19121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51889.

It is not an unprimeable number, because it can be changed into a prime (51829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1347 + ... + 1384.

It is an arithmetic number, because the mean of its divisors is an integer number (13660).

2⁵¹⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

51889 is a deficient number, since it is larger than the sum of its proper divisors (2751).

51889 is a wasteful number, since it uses less digits than its factorization.

51889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2750.

The product of its digits is 2880, while the sum is 31.

The square root of 51889 is about 227.7915713981. The cubic root of 51889 is about 37.2985343961.

The spelling of 51889 in words is "fifty-one thousand, eight hundred eighty-nine".