1005500565 has 12 divisors (see below), whose sum is σ = 1742867724. Its totient is φ = 536266944.

The previous prime is 1005500477. The next prime is 1005500599. The reversal of 1005500565 is 5650055001.

1005500565 is a `hidden beast` number, since 100 + 5 + 500 + 56 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 476592561 + 528908004 = 21831^2 + 22998^2 .

It is not a de Polignac number, because 1005500565 - 2⁹ = 1005500053 is a prime.

It is a super-2 number, since 2×1005500565² = 2022062772430638450, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11172184 + ... + 11172273.

It is an arithmetic number, because the mean of its divisors is an integer number (145238977).

Almost surely, 2^1005500565 is an apocalyptic number.

1005500565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1005500565 is a deficient number, since it is larger than the sum of its proper divisors (737367159).

1005500565 is a wasteful number, since it uses less digits than its factorization.

1005500565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22344468 (or 22344465 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 27.

The square root of 1005500565 is about 31709.6289003829. The cubic root of 1005500565 is about 1001.8301701007.

Adding to 1005500565 its reverse (5650055001), we get a palindrome (6655555566).

The spelling of 1005500565 in words is "one billion, five million, five hundred thousand, five hundred sixty-five".