255510 has 48 divisors (see below), whose sum is σ = 707616. Its totient is φ = 63744.

The previous prime is 255503. The next prime is 255511. The reversal of 255510 is 15552.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255511) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1447 + ... + 1613.

It is an arithmetic number, because the mean of its divisors is an integer number (14742).

2²⁵⁵⁵¹⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 255510, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (353808).

255510 is an abundant number, since it is smaller than the sum of its proper divisors (452106).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

255510 is a wasteful number, since it uses less digits than its factorization.

255510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197 (or 194 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 18.

The square root of 255510 is about 505.4799699296. The cubic root of 255510 is about 63.4555044062.

The spelling of 255510 in words is "two hundred fifty-five thousand, five hundred ten".