55488809 has 4 divisors (see below), whose sum is σ = 56007504. Its totient is φ = 54970116.

The previous prime is 55488787. The next prime is 55488817. The reversal of 55488809 is 90888455.

55488809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55488809 - 2¹² = 55484713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55488859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 259187 + ... + 259400.

It is an arithmetic number, because the mean of its divisors is an integer number (14001876).

Almost surely, 2^55488809 is an apocalyptic number.

It is an amenable number.

55488809 is a deficient number, since it is larger than the sum of its proper divisors (518695).

55488809 is a wasteful number, since it uses less digits than its factorization.

55488809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518694.

The product of its (nonzero) digits is 460800, while the sum is 47.

The square root of 55488809 is about 7449.0810842680. The cubic root of 55488809 is about 381.4185414802.

The spelling of 55488809 in words is "fifty-five million, four hundred eighty-eight thousand, eight hundred nine".