505550000 has 60 divisors (see below), whose sum is σ = 1224421632. Its totient is φ = 202200000.

The previous prime is 505549999. The next prime is 505550027. The reversal of 505550000 is 55505.

It is a happy number.

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

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 11 ways as a sum of consecutive naturals, for example, 44945 + ... + 55055.

Almost surely, 2^505550000 is an apocalyptic number.

505550000 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 505550000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (612210816).

505550000 is an abundant number, since it is smaller than the sum of its proper divisors (718871632).

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

505550000 is an equidigital number, since it uses as much as digits as its factorization.

505550000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10144 (or 10118 counting only the distinct ones).

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

The square root of 505550000 is about 22484.4390634946. The cubic root of 505550000 is about 796.6264186837.

It can be divided in two parts, 5055 and 50000, that added together give a palindrome (55055).

The spelling of 505550000 in words is "five hundred five million, five hundred fifty thousand".