505550 has 12 divisors (see below), whose sum is σ = 940416. Its totient is φ = 202200.

The previous prime is 505537. The next prime is 505559. The reversal of 505550 is 55505.

It is a happy number.

505550 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505559) by changing a digit.

505550 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5006 + ... + 5105.

It is an arithmetic number, because the mean of its divisors is an integer number (78368).

2⁵⁰⁵⁵⁵⁰ is an apocalyptic number.

505550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

505550 is a deficient number, since it is larger than the sum of its proper divisors (434866).

505550 is a wasteful number, since it uses less digits than its factorization.

505550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10123 (or 10118 counting only the distinct ones).

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

The square root of 505550 is about 711.0203935191. The cubic root of 505550 is about 79.6626418684.

The spelling of 505550 in words is "five hundred five thousand, five hundred fifty".