555220 has 48 divisors (see below), whose sum is σ = 1306368. Its totient is φ = 197120.

The previous prime is 555209. The next prime is 555221. The reversal of 555220 is 22555.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (555221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7785 + ... + 7855.

It is an arithmetic number, because the mean of its divisors is an integer number (27216).

2⁵⁵⁵²²⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 555220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (653184).

555220 is an abundant number, since it is smaller than the sum of its proper divisors (751148).

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

555220 is a wasteful number, since it uses less digits than its factorization.

555220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120 (or 118 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 19.

The square root of 555220 is about 745.1308609902. The cubic root of 555220 is about 82.1905147877.

Adding to 555220 its reverse (22555), we get a palindrome (577775).

It can be divided in two parts, 5 and 55220, that added together give a square (55225 = 235²).

The spelling of 555220 in words is "five hundred fifty-five thousand, two hundred twenty".