505000100 has 36 divisors (see below), whose sum is σ = 1195475568. Its totient is φ = 183636000.

The previous prime is 505000091. The next prime is 505000103. The reversal of 505000100 is 1000505.

It is a Harshad number since it is a multiple of its sum of digits (11).

It is not an unprimeable number, because it can be changed into a prime (505000103) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 228446 + ... + 230645.

Almost surely, 2^505000100 is an apocalyptic number.

505000100 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

505000100 is an abundant number, since it is smaller than the sum of its proper divisors (690475468).

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

505000100 is a wasteful number, since it uses less digits than its factorization.

505000100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459116 (or 459109 counting only the distinct ones).

The product of its (nonzero) digits is 25, while the sum is 11.

The square root of 505000100 is about 22472.2072792149. The cubic root of 505000100 is about 796.3374767424.

Adding to 505000100 its reverse (1000505), we get a palindrome (506000605).

The spelling of 505000100 in words is "five hundred five million, one hundred", and thus it is an aban number.