255320 has 32 divisors (see below), whose sum is σ = 619920. Its totient is φ = 94080.

The previous prime is 255313. The next prime is 255329. The reversal of 255320 is 23552.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 255320.

It is not an unprimeable number, because it can be changed into a prime (255329) by changing a digit.

255320 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275 + ... + 765.

2²⁵⁵³²⁰ is an apocalyptic number.

255320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 255320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (309960).

255320 is an abundant number, since it is smaller than the sum of its proper divisors (364600).

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

255320 is a wasteful number, since it uses less digits than its factorization.

255320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515 (or 511 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 17.

The square root of 255320 is about 505.2919947911. The cubic root of 255320 is about 63.4397717727.

Adding to 255320 its reverse (23552), we get a palindrome (278872).

It can be divided in two parts, 255 and 320, that added together give a palindrome (575).

The spelling of 255320 in words is "two hundred fifty-five thousand, three hundred twenty".