505555000 has 40 divisors (see below), whose sum is σ = 1184527080. Its totient is φ = 202220000.

The previous prime is 505554989. The next prime is 505555031. The reversal of 505555000 is 555505.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

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 9 ways as a sum of consecutive naturals, for example, 45556 + ... + 55555.

It is an arithmetic number, because the mean of its divisors is an integer number (29613177).

Almost surely, 2^505555000 is an apocalyptic number.

505555000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

505555000 is an abundant number, since it is smaller than the sum of its proper divisors (678972080).

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

505555000 is a wasteful number, since it uses less digits than its factorization.

505555000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101137 (or 101118 counting only the distinct ones).

The product of its (nonzero) digits is 3125, while the sum is 25.

The square root of 505555000 is about 22484.5502512281. The cubic root of 505555000 is about 796.6290449449.

It can be divided in two parts, 50555 and 5000, that added together give a palindrome (55555).

The spelling of 505555000 in words is "five hundred five million, five hundred fifty-five thousand".