2555 has 8 divisors (see below), whose sum is σ = 3552. Its totient is φ = 1728.

The previous prime is 2551. The next prime is 2557. The reversal of 2555 is 5552.

2555 = 16² + 17² + ... + 22².

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2555 - 2² = 2551 is a prime.

It is a Duffinian number.

2555 is a modest number, since divided by 55 gives 25 as remainder.

It is a plaindrome in base 9, base 10 and base 12.

It is a nialpdrome in base 15.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 2555.

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 7 ways as a sum of consecutive naturals, for example, 2 + ... + 71.

It is an arithmetic number, because the mean of its divisors is an integer number (444).

2555 is a deficient number, since it is larger than the sum of its proper divisors (997).

2555 is an equidigital number, since it uses as much as digits as its factorization.

2555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85.

The product of its digits is 250, while the sum is 17.

The square root of 2555 is about 50.5470078244. The cubic root of 2555 is about 13.6708956441.

It can be divided in two parts, 255 and 5, that multiplied together give a triangular number (1275 = T₅₀).

The spelling of 2555 in words is "two thousand, five hundred fifty-five".