2559 has 4 divisors (see below), whose sum is σ = 3416. Its totient is φ = 1704.

The previous prime is 2557. The next prime is 2579. The reversal of 2559 is 9552.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2559 - 2¹ = 2557 is a prime.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 8, base 10 and base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2551) 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, 424 + ... + 429.

It is an arithmetic number, because the mean of its divisors is an integer number (854).

2559 is a deficient number, since it is larger than the sum of its proper divisors (857).

2559 is an equidigital number, since it uses as much as digits as its factorization.

2559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856.

The product of its digits is 450, while the sum is 21.

The square root of 2559 is about 50.5865594798. The cubic root of 2559 is about 13.6780261165.

It can be divided in two parts, 2 and 559, that added together give a triangular number (561 = T₃₃).

The spelling of 2559 in words is "two thousand, five hundred fifty-nine".