5565509 has 2 divisors, whose sum is σ = 5565510. Its totient is φ = 5565508.

The previous prime is 5565491. The next prime is 5565551. The reversal of 5565509 is 9055655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5536609 + 28900 = 2353^2 + 170^2 .

It is a cyclic number.

It is not a de Polignac number, because 5565509 - 2¹⁶ = 5499973 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5565809) by changing a digit.

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 as a sum of consecutive naturals, namely, 2782754 + 2782755.

It is an arithmetic number, because the mean of its divisors is an integer number (2782755).

Almost surely, 2^5565509 is an apocalyptic number.

It is an amenable number.

5565509 is a deficient number, since it is larger than the sum of its proper divisors (1).

5565509 is an equidigital number, since it uses as much as digits as its factorization.

5565509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33750, while the sum is 35.

The square root of 5565509 is about 2359.1331034937. The cubic root of 5565509 is about 177.2154695563.

The spelling of 5565509 in words is "five million, five hundred sixty-five thousand, five hundred nine".