505005055 has 4 divisors (see below), whose sum is σ = 606006072. Its totient is φ = 404004040.

The previous prime is 505005049. The next prime is 505005091. The reversal of 505005055 is 550500505.

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

It is not a de Polignac number, because 505005055 - 2²³ = 496616447 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

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, 50500501 + ... + 50500510.

It is an arithmetic number, because the mean of its divisors is an integer number (151501518).

Almost surely, 2^505005055 is an apocalyptic number.

505005055 is a deficient number, since it is larger than the sum of its proper divisors (101001017).

505005055 is a wasteful number, since it uses less digits than its factorization.

505005055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101001016.

The product of its (nonzero) digits is 3125, while the sum is 25.

The square root of 505005055 is about 22472.3175262366. The cubic root of 505005055 is about 796.3400812563.

It can be divided in two parts, 50500 and 5055, that added together give a palindrome (55555).

The spelling of 505005055 in words is "five hundred five million, five thousand, fifty-five".