55885555 has 16 divisors (see below), whose sum is σ = 77011200. Its totient is φ = 38504160.

The previous prime is 55885549. The next prime is 55885559. The reversal of 55885555 is 55558855.

It is not a de Polignac number, because 55885555 - 2⁹ = 55885043 is a prime.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (55885559) 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 in 15 ways as a sum of consecutive naturals, for example, 25695 + ... + 27784.

It is an arithmetic number, because the mean of its divisors is an integer number (4813200).

Almost surely, 2^55885555 is an apocalyptic number.

55885555 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55885555 is a deficient number, since it is larger than the sum of its proper divisors (21125645).

55885555 is a wasteful number, since it uses less digits than its factorization.

55885555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53514.

The product of its digits is 1000000, while the sum is 46.

The square root of 55885555 is about 7475.6641845391. The cubic root of 55885555 is about 382.3254333221.

The spelling of 55885555 in words is "fifty-five million, eight hundred eighty-five thousand, five hundred fifty-five".