55404205 has 4 divisors (see below), whose sum is σ = 66485052. Its totient is φ = 44323360.

The previous prime is 55404203. The next prime is 55404221. The reversal of 55404205 is 50240455.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35450116 + 19954089 = 5954^2 + 4467^2 .

It is not a de Polignac number, because 55404205 - 2¹ = 55404203 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 55404205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55404203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5540416 + ... + 5540425.

It is an arithmetic number, because the mean of its divisors is an integer number (16621263).

Almost surely, 2^55404205 is an apocalyptic number.

It is an amenable number.

55404205 is a deficient number, since it is larger than the sum of its proper divisors (11080847).

55404205 is a wasteful number, since it uses less digits than its factorization.

55404205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11080846.

The product of its (nonzero) digits is 4000, while the sum is 25.

The square root of 55404205 is about 7443.4000967300. The cubic root of 55404205 is about 381.2245927707.

The spelling of 55404205 in words is "fifty-five million, four hundred four thousand, two hundred five".