51089 has 4 divisors (see below), whose sum is σ = 52224. Its totient is φ = 49956.

The previous prime is 51071. The next prime is 51109. The reversal of 51089 is 98015.

51089 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: 98015 = 5 ⋅19603.

It is a cyclic number.

It is not a de Polignac number, because 51089 - 2⁸ = 50833 is a prime.

It is a super-2 number, since 2×51089² = 5220171842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51059) 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, 497 + ... + 590.

It is an arithmetic number, because the mean of its divisors is an integer number (13056).

2⁵¹⁰⁸⁹ is an apocalyptic number.

It is an amenable number.

51089 is a deficient number, since it is larger than the sum of its proper divisors (1135).

51089 is a wasteful number, since it uses less digits than its factorization.

51089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1134.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 51089 is about 226.0287592321. The cubic root of 51089 is about 37.1058570682.

It can be divided in two parts, 5 and 1089, that multiplied together give a palindrome (5445).

The spelling of 51089 in words is "fifty-one thousand, eighty-nine".