505005555 has 16 divisors (see below), whose sum is σ = 816011424. Its totient is φ = 266668800.

The previous prime is 505005521. The next prime is 505005559. The reversal of 505005555 is 555500505.

It is not a de Polignac number, because 505005555 - 2⁸ = 505005299 is a prime.

It is a super-2 number, since 2×505005555² = 510061221161716050, which contains 22 as substring.

505005555 is a modest number, since divided by 5555 gives 505 as remainder.

It is not an unprimeable number, because it can be changed into a prime (505005559) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 165154 + ... + 168183.

It is an arithmetic number, because the mean of its divisors is an integer number (51000714).

Almost surely, 2^505005555 is an apocalyptic number.

505005555 is a deficient number, since it is larger than the sum of its proper divisors (311005869).

505005555 is a wasteful number, since it uses less digits than its factorization.

505005555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333446.

The product of its (nonzero) digits is 15625, while the sum is 30.

The square root of 505005555 is about 22472.3286510321. The cubic root of 505005555 is about 796.3403440721.

The spelling of 505005555 in words is "five hundred five million, five thousand, five hundred fifty-five".