505555505 has 32 divisors (see below), whose sum is σ = 749952000. Its totient is φ = 318592512.

The previous prime is 505555481. The next prime is 505555507.

505555505 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 505555505 - 2¹⁰ = 505554481 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is not an unprimeable number, because it can be changed into a prime (505555507) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 106421 + ... + 111069.

It is an arithmetic number, because the mean of its divisors is an integer number (23436000).

Almost surely, 2^505555505 is an apocalyptic number.

It is an amenable number.

505555505 is a deficient number, since it is larger than the sum of its proper divisors (244396495).

505555505 is a wasteful number, since it uses less digits than its factorization.

505555505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4913.

The product of its (nonzero) digits is 78125, while the sum is 35.

The square root of 505555505 is about 22484.5614811586. The cubic root of 505555505 is about 796.6293101963.

It can be divided in two parts, 50 and 5555505, that added together give a palindrome (5555555).

The spelling of 505555505 in words is "five hundred five million, five hundred fifty-five thousand, five hundred five".