55885209 has 8 divisors (see below), whose sum is σ = 76099200. Its totient is φ = 36464016.

The previous prime is 55885201. The next prime is 55885229. The reversal of 55885209 is 90258855.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55885209 - 2³ = 55885201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55885201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198034 + ... + 198315.

It is an arithmetic number, because the mean of its divisors is an integer number (9512400).

Almost surely, 2^55885209 is an apocalyptic number.

It is an amenable number.

55885209 is a deficient number, since it is larger than the sum of its proper divisors (20213991).

55885209 is a wasteful number, since it uses less digits than its factorization.

55885209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396399.

The product of its (nonzero) digits is 144000, while the sum is 42.

The square root of 55885209 is about 7475.6410427468. The cubic root of 55885209 is about 382.3246442997.

The spelling of 55885209 in words is "fifty-five million, eight hundred eighty-five thousand, two hundred nine".