505500 has 48 divisors (see below), whose sum is σ = 1476384. Its totient is φ = 134400.

The previous prime is 505493. The next prime is 505501. The reversal of 505500 is 5505.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a self number, because there is not a number n which added to its sum of digits gives 505500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505501) 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, 1332 + ... + 1668.

It is an arithmetic number, because the mean of its divisors is an integer number (30758).

2⁵⁰⁵⁵⁰⁰ is an apocalyptic number.

505500 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 505500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (738192).

505500 is an abundant number, since it is smaller than the sum of its proper divisors (970884).

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

505500 is a wasteful number, since it uses less digits than its factorization.

505500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359 (or 347 counting only the distinct ones).

The product of its (nonzero) digits is 125, while the sum is 15.

The square root of 505500 is about 710.9852319141. The cubic root of 505500 is about 79.6600155120.

Adding to 505500 its sum of digits (15), we get a triangular number (505515 = T₁₀₀₅).

The spelling of 505500 in words is "five hundred five thousand, five hundred".