55209005 has 16 divisors (see below), whose sum is σ = 67972800. Its totient is φ = 43034112.

The previous prime is 55208999. The next prime is 55209017. The reversal of 55209005 is 50090255.

55209005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 55209005 - 2⁶ = 55208941 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 31646 + ... + 33344.

It is an arithmetic number, because the mean of its divisors is an integer number (4248300).

Almost surely, 2^55209005 is an apocalyptic number.

It is an amenable number.

55209005 is a deficient number, since it is larger than the sum of its proper divisors (12763795).

55209005 is a wasteful number, since it uses less digits than its factorization.

55209005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1868.

The product of its (nonzero) digits is 2250, while the sum is 26.

The square root of 55209005 is about 7430.2762398177. The cubic root of 55209005 is about 380.7763560051.

Adding to 55209005 its product of nonzero digits (2250), we get a palindrome (55211255).

The spelling of 55209005 in words is "fifty-five million, two hundred nine thousand, five".