255220 has 24 divisors (see below), whose sum is σ = 612864. Its totient is φ = 87456.

The previous prime is 255217. The next prime is 255239. The reversal of 255220 is 22552.

It is a junction number, because it is equal to n+sod(n) for n = 255194 and 255203.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 772 + ... + 1051.

It is an arithmetic number, because the mean of its divisors is an integer number (25536).

2²⁵⁵²²⁰ is an apocalyptic number.

255220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255220 is an abundant number, since it is smaller than the sum of its proper divisors (357644).

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

255220 is a wasteful number, since it uses less digits than its factorization.

255220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1839 (or 1837 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 16.

The square root of 255220 is about 505.1930324143. The cubic root of 255220 is about 63.4314883041.

Adding to 255220 its reverse (22552), we get a palindrome (277772).

It can be divided in two parts, 2552 and 20, that multiplied together give a triangular number (51040 = T₃₁₉).

The spelling of 255220 in words is "two hundred fifty-five thousand, two hundred twenty".