555500 has 48 divisors (see below), whose sum is σ = 1336608. Its totient is φ = 200000.

The previous prime is 555491. The next prime is 555521. The reversal of 555500 is 5555.

555500 = 260² + 261² + ... + 267².

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

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 15 ways as a sum of consecutive naturals, for example, 5450 + ... + 5550.

It is an arithmetic number, because the mean of its divisors is an integer number (27846).

2⁵⁵⁵⁵⁰⁰ is an apocalyptic number.

555500 is a gapful number since it is divisible by the number (50) 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 555500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (668304).

555500 is an abundant number, since it is smaller than the sum of its proper divisors (781108).

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

555500 is a wasteful number, since it uses less digits than its factorization.

555500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 625, while the sum is 20.

The square root of 555500 is about 745.3187237686. The cubic root of 555500 is about 82.2043288174.

Subtracting from 555500 its reverse (5555), we obtain a palindrome (549945).

Multiplying 555500 by its reverse (5555), we get a square (3085802500 = 55550²).

555500 divided by its reverse (5555) gives a square (100 = 10²).

It can be divided in two parts, 55 and 5500, that multiplied together give a square (302500 = 550²).

The spelling of 555500 in words is "five hundred fifty-five thousand, five hundred".