220220505 has 16 divisors (see below), whose sum is σ = 391503360. Its totient is φ = 117450864.

The previous prime is 220220477. The next prime is 220220551. The reversal of 220220505 is 505022022.

It is not a de Polignac number, because 220220505 - 2¹¹ = 220218457 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 815497 + ... + 815766.

It is an arithmetic number, because the mean of its divisors is an integer number (24468960).

Almost surely, 2^220220505 is an apocalyptic number.

It is an amenable number.

220220505 is a deficient number, since it is larger than the sum of its proper divisors (171282855).

220220505 is a wasteful number, since it uses less digits than its factorization.

220220505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1631277 (or 1631271 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 220220505 is about 14839.8283345866. The cubic root of 220220505 is about 603.8826952653.

Adding to 220220505 its reverse (505022022), we get a palindrome (725242527).

The spelling of 220220505 in words is "two hundred twenty million, two hundred twenty thousand, five hundred five".