1000505500 has 48 divisors (see below), whose sum is σ = 2188446624. Its totient is φ = 399590400.

The previous prime is 1000505461. The next prime is 1000505551. The reversal of 1000505500 is 55050001.

It is a super-2 number, since 2×1000505500² = 2002022511060500000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable 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 15 ways as a sum of consecutive naturals, for example, 472444 + ... + 474556.

It is an arithmetic number, because the mean of its divisors is an integer number (45592638).

Almost surely, 2^1000505500 is an apocalyptic number.

1000505500 is a gapful number since it is divisible by the number (10) 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 1000505500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1094223312).

1000505500 is an abundant number, since it is smaller than the sum of its proper divisors (1187941124).

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

1000505500 is a wasteful number, since it uses less digits than its factorization.

1000505500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3079 (or 3067 counting only the distinct ones).

The product of its (nonzero) digits is 125, while the sum is 16.

The square root of 1000505500 is about 31630.7682486531. The cubic root of 1000505500 is about 1000.1684716157.

Adding to 1000505500 its reverse (55050001), we get a palindrome (1055555501).

The spelling of 1000505500 in words is "one billion, five hundred five thousand, five hundred".