55506885 has 32 divisors (see below), whose sum is σ = 106844160. Its totient is φ = 24038208.

The previous prime is 55506883. The next prime is 55506931. The reversal of 55506885 is 58860555.

It is not a de Polignac number, because 55506885 - 2¹ = 55506883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55506881) 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 31 ways as a sum of consecutive naturals, for example, 11917 + ... + 15906.

It is an arithmetic number, because the mean of its divisors is an integer number (3338880).

Almost surely, 2^55506885 is an apocalyptic number.

It is an amenable number.

55506885 is a deficient number, since it is larger than the sum of its proper divisors (51337275).

55506885 is a wasteful number, since it uses less digits than its factorization.

55506885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27857.

The product of its (nonzero) digits is 240000, while the sum is 42.

The square root of 55506885 is about 7450.2942894895. The cubic root of 55506885 is about 381.4599538728.

The spelling of 55506885 in words is "fifty-five million, five hundred six thousand, eight hundred eighty-five".