550256 has 40 divisors (see below), whose sum is σ = 1294560. Its totient is φ = 221952.

The previous prime is 550241. The next prime is 550267. The reversal of 550256 is 652055.

550256 = T₃₉₃ + T₃₉₄ + ... + T₃₉₉.

It is a congruent number.

It is an unprimeable number.

550256 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, 32360 + ... + 32376.

It is an arithmetic number, because the mean of its divisors is an integer number (32364).

2⁵⁵⁰²⁵⁶ is an apocalyptic number.

550256 is a gapful number since it is divisible by the number (56) 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 550256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (647280).

550256 is an abundant number, since it is smaller than the sum of its proper divisors (744304).

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

550256 is an equidigital number, since it uses as much as digits as its factorization.

550256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66 (or 26 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 550256 is about 741.7924237952. The cubic root of 550256 is about 81.9448369820.

The spelling of 550256 in words is "five hundred fifty thousand, two hundred fifty-six".