55000565 has 4 divisors (see below), whose sum is σ = 66000684. Its totient is φ = 44000448.

The previous prime is 55000553. The next prime is 55000571. The reversal of 55000565 is 56500055.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29528356 + 25472209 = 5434^2 + 5047^2 .

It is a cyclic number.

It is not a de Polignac number, because 55000565 - 2⁴ = 55000549 is a prime.

It is a Duffinian number.

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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5500052 + ... + 5500061.

It is an arithmetic number, because the mean of its divisors is an integer number (16500171).

Almost surely, 2^55000565 is an apocalyptic number.

It is an amenable number.

55000565 is a deficient number, since it is larger than the sum of its proper divisors (11000119).

55000565 is a wasteful number, since it uses less digits than its factorization.

55000565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11000118.

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

The square root of 55000565 is about 7416.2365792901. The cubic root of 55000565 is about 380.2965482948.

The spelling of 55000565 in words is "fifty-five million, five hundred sixty-five", and thus it is an aban number.