55565863 has 2 divisors, whose sum is σ = 55565864. Its totient is φ = 55565862.

The previous prime is 55565833. The next prime is 55565869. The reversal of 55565863 is 36856555.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55565863 - 2²¹ = 53468711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55565869) 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, 27782931 + 27782932.

It is an arithmetic number, because the mean of its divisors is an integer number (27782932).

Almost surely, 2^55565863 is an apocalyptic number.

55565863 is a deficient number, since it is larger than the sum of its proper divisors (1).

55565863 is an equidigital number, since it uses as much as digits as its factorization.

55565863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 540000, while the sum is 43.

The square root of 55565863 is about 7454.2513373242. The cubic root of 55565863 is about 381.5950108821.

The spelling of 55565863 in words is "fifty-five million, five hundred sixty-five thousand, eight hundred sixty-three".