505565000 has 40 divisors (see below), whose sum is σ = 1184550510. Its totient is φ = 202224000.

The previous prime is 505564991. The next prime is 505565059. The reversal of 505565000 is 565505.

It can be written as a sum of positive squares in 5 ways, for example, as 25867396 + 479697604 = 5086^2 + 21902^2 .

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

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 9 ways as a sum of consecutive naturals, for example, 45557 + ... + 55556.

Almost surely, 2^505565000 is an apocalyptic number.

505565000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

505565000 is an abundant number, since it is smaller than the sum of its proper divisors (678985510).

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

505565000 is a wasteful number, since it uses less digits than its factorization.

505565000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101139 (or 101120 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 26.

The square root of 505565000 is about 22484.7726250456. The cubic root of 505565000 is about 796.6342974152.

The spelling of 505565000 in words is "five hundred five million, five hundred sixty-five thousand".