51259 has 4 divisors (see below), whose sum is σ = 55216. Its totient is φ = 47304.

The previous prime is 51257. The next prime is 51263. The reversal of 51259 is 95215.

51259 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.

It is a cyclic number.

It is not a de Polignac number, because 51259 - 2¹ = 51257 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51257) 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, 1959 + ... + 1984.

It is an arithmetic number, because the mean of its divisors is an integer number (13804).

2⁵¹²⁵⁹ is an apocalyptic number.

51259 is a deficient number, since it is larger than the sum of its proper divisors (3957).

51259 is a wasteful number, since it uses less digits than its factorization.

51259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3956.

The product of its digits is 450, while the sum is 22.

The square root of 51259 is about 226.4045052555. The cubic root of 51259 is about 37.1469684094.

Subtracting 51259 from its reverse (95215), we obtain a triangular number (43956 = T₂₉₆).

The spelling of 51259 in words is "fifty-one thousand, two hundred fifty-nine".