55205305 has 8 divisors (see below), whose sum is σ = 67332744. Its totient is φ = 43440000.

The previous prime is 55205291. The next prime is 55205321. The reversal of 55205305 is 50350255.

It can be written as a sum of positive squares in 4 ways, for example, as 5798464 + 49406841 = 2408^2 + 7029^2 .

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

It is not a de Polignac number, because 55205305 - 2⁷ = 55205177 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55205305.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90196 + ... + 90805.

It is an arithmetic number, because the mean of its divisors is an integer number (8416593).

Almost surely, 2^55205305 is an apocalyptic number.

It is an amenable number.

55205305 is a deficient number, since it is larger than the sum of its proper divisors (12127439).

55205305 is a wasteful number, since it uses less digits than its factorization.

55205305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181067.

The product of its (nonzero) digits is 3750, while the sum is 25.

The square root of 55205305 is about 7430.0272543242. The cubic root of 55205305 is about 380.7678495185.

The spelling of 55205305 in words is "fifty-five million, two hundred five thousand, three hundred five".