55843209 has 8 divisors (see below), whose sum is σ = 82730720. Its totient is φ = 37228788.

The previous prime is 55843187. The next prime is 55843213. The reversal of 55843209 is 90234855.

It is not a de Polignac number, because 55843209 - 2²¹ = 53746057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55843289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1034107 + ... + 1034160.

It is an arithmetic number, because the mean of its divisors is an integer number (10341340).

Almost surely, 2^55843209 is an apocalyptic number.

It is an amenable number.

55843209 is a deficient number, since it is larger than the sum of its proper divisors (26887511).

55843209 is a wasteful number, since it uses less digits than its factorization.

55843209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2068276 (or 2068270 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 55843209 is about 7472.8313911127. The cubic root of 55843209 is about 382.2288428065.

The spelling of 55843209 in words is "fifty-five million, eight hundred forty-three thousand, two hundred nine".