55675209 has 4 divisors (see below), whose sum is σ = 74233616. Its totient is φ = 37116804.

The previous prime is 55675181. The next prime is 55675223. The reversal of 55675209 is 90257655.

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 not a de Polignac number, because 55675209 - 2⁸ = 55674953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55675229) 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 3 ways as a sum of consecutive naturals, for example, 9279199 + ... + 9279204.

It is an arithmetic number, because the mean of its divisors is an integer number (18558404).

Almost surely, 2^55675209 is an apocalyptic number.

It is an amenable number.

55675209 is a deficient number, since it is larger than the sum of its proper divisors (18558407).

55675209 is a wasteful number, since it uses less digits than its factorization.

55675209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18558406.

The product of its (nonzero) digits is 94500, while the sum is 39.

The square root of 55675209 is about 7461.5822048678. The cubic root of 55675209 is about 381.8451557577.

The spelling of 55675209 in words is "fifty-five million, six hundred seventy-five thousand, two hundred nine".