51859 has 2 divisors, whose sum is σ = 51860. Its totient is φ = 51858.

The previous prime is 51853. The next prime is 51869. The reversal of 51859 is 95815.

51859 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51859 - 2⁵ = 51827 is a prime.

51859 is a lucky number.

It is a nialpdrome in base 16.

It is not a weakly prime, because it can be changed into another prime (51853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25929 + 25930.

It is an arithmetic number, because the mean of its divisors is an integer number (25930).

2⁵¹⁸⁵⁹ is an apocalyptic number.

51859 is a deficient number, since it is larger than the sum of its proper divisors (1).

51859 is an equidigital number, since it uses as much as digits as its factorization.

51859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1800, while the sum is 28.

The square root of 51859 is about 227.7257122066. The cubic root of 51859 is about 37.2913448713.

Subtracting 51859 from its reverse (95815), we obtain a triangular number (43956 = T₂₉₆).

It can be divided in two parts, 5185 and 9, that multiplied together give a triangular number (46665 = T₃₀₅).

The spelling of 51859 in words is "fifty-one thousand, eight hundred fifty-nine".