55565099 has 2 divisors, whose sum is σ = 55565100. Its totient is φ = 55565098.

The previous prime is 55565087. The next prime is 55565117. The reversal of 55565099 is 99056555.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55565099 is a prime.

It is not a weakly prime, because it can be changed into another prime (55535099) by changing a digit.

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 as a sum of consecutive naturals, namely, 27782549 + 27782550.

It is an arithmetic number, because the mean of its divisors is an integer number (27782550).

Almost surely, 2^55565099 is an apocalyptic number.

55565099 is a deficient number, since it is larger than the sum of its proper divisors (1).

55565099 is an equidigital number, since it uses as much as digits as its factorization.

55565099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 303750, while the sum is 44.

The square root of 55565099 is about 7454.2000912237. The cubic root of 55565099 is about 381.5932619670.

The spelling of 55565099 in words is "fifty-five million, five hundred sixty-five thousand, ninety-nine".