505005500 has 72 divisors (see below), whose sum is σ = 1140742512. Its totient is φ = 195300000.

The previous prime is 505005493. The next prime is 505005517. The reversal of 505005500 is 5500505.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 479975 + ... + 481025.

It is an arithmetic number, because the mean of its divisors is an integer number (15843646).

Almost surely, 2^505005500 is an apocalyptic number.

505005500 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 505005500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (570371256).

505005500 is an abundant number, since it is smaller than the sum of its proper divisors (635737012).

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

505005500 is a wasteful number, since it uses less digits than its factorization.

505005500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1132 (or 1089 counting only the distinct ones).

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

The square root of 505005500 is about 22472.3274273049. The cubic root of 505005500 is about 796.3403151624.

It can be divided in two parts, 505005 and 500, that added together give a palindrome (505505).

The spelling of 505005500 in words is "five hundred five million, five thousand, five hundred".