505965218 has 16 divisors (see below), whose sum is σ = 829090080. Its totient is φ = 229665600.

The previous prime is 505965209. The next prime is 505965221. The reversal of 505965218 is 812569505.

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 7 ways as a sum of consecutive naturals, for example, 698 + ... + 31818.

It is an arithmetic number, because the mean of its divisors is an integer number (51818130).

Almost surely, 2^505965218 is an apocalyptic number.

505965218 is a deficient number, since it is larger than the sum of its proper divisors (323124862).

505965218 is a wasteful number, since it uses less digits than its factorization.

505965218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31873.

The product of its (nonzero) digits is 108000, while the sum is 41.

The square root of 505965218 is about 22493.6706208658. The cubic root of 505965218 is about 796.8444539013.

The spelling of 505965218 in words is "five hundred five million, nine hundred sixty-five thousand, two hundred eighteen".