55242205 has 8 divisors (see below), whose sum is σ = 69172992. Its totient is φ = 42272208.

The previous prime is 55242199. The next prime is 55242241. The reversal of 55242205 is 50224255.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 55242205 - 2¹⁵ = 55209437 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 55242205.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 240069 + ... + 240298.

It is an arithmetic number, because the mean of its divisors is an integer number (8646624).

Almost surely, 2^55242205 is an apocalyptic number.

It is an amenable number.

55242205 is a deficient number, since it is larger than the sum of its proper divisors (13930787).

55242205 is a wasteful number, since it uses less digits than its factorization.

55242205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480395.

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

The square root of 55242205 is about 7432.5100067205. The cubic root of 55242205 is about 380.8526674801.

The spelling of 55242205 in words is "fifty-five million, two hundred forty-two thousand, two hundred five".