42205055 has 4 divisors (see below), whose sum is σ = 50646072. Its totient is φ = 33764040.

The previous prime is 42205019. The next prime is 42205073. The reversal of 42205055 is 55050224.

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

It is not a de Polignac number, because 42205055 - 2²² = 38010751 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 42205055.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4220501 + ... + 4220510.

It is an arithmetic number, because the mean of its divisors is an integer number (12661518).

Almost surely, 2^42205055 is an apocalyptic number.

42205055 is a deficient number, since it is larger than the sum of its proper divisors (8441017).

42205055 is an equidigital number, since it uses as much as digits as its factorization.

42205055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8441016.

The product of its (nonzero) digits is 2000, while the sum is 23.

The square root of 42205055 is about 6496.5417723586. The cubic root of 42205055 is about 348.1674421016.

Adding to 42205055 its sum of digits (23), we get a triangular number (42205078 = T₉₁₈₇).

Adding to 42205055 its reverse (55050224), we get a palindrome (97255279).

The spelling of 42205055 in words is "forty-two million, two hundred five thousand, fifty-five".