505005220 has 12 divisors (see below), whose sum is σ = 1060511004. Its totient is φ = 202002080.

The previous prime is 505005211. The next prime is 505005233. The reversal of 505005220 is 22500505.

It can be written as a sum of positive squares in 2 ways, for example, as 135443044 + 369562176 = 11638^2 + 19224^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12625111 + ... + 12625150.

It is an arithmetic number, because the mean of its divisors is an integer number (88375917).

Almost surely, 2^505005220 is an apocalyptic number.

It is an amenable number.

505005220 is an abundant number, since it is smaller than the sum of its proper divisors (555505784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

505005220 is a wasteful number, since it uses less digits than its factorization.

505005220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25250270 (or 25250268 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 19.

The square root of 505005220 is about 22472.3211974197. The cubic root of 505005220 is about 796.3401679855.

Adding to 505005220 its reverse (22500505), we get a palindrome (527505725).

The spelling of 505005220 in words is "five hundred five million, five thousand, two hundred twenty".