220304505 has 16 divisors (see below), whose sum is σ = 353505600. Its totient is φ = 117156288.

The previous prime is 220304473. The next prime is 220304543. The reversal of 220304505 is 505403022.

It is not a de Polignac number, because 220304505 - 2⁵ = 220304473 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 15807 + ... + 26276.

It is an arithmetic number, because the mean of its divisors is an integer number (22094100).

Almost surely, 2^220304505 is an apocalyptic number.

It is an amenable number.

220304505 is a deficient number, since it is larger than the sum of its proper divisors (133201095).

220304505 is a wasteful number, since it uses less digits than its factorization.

220304505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42440.

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 220304505 is about 14842.6582861696. The cubic root of 220304505 is about 603.9594663456.

Adding to 220304505 its reverse (505403022), we get a palindrome (725707527).

The spelling of 220304505 in words is "two hundred twenty million, three hundred four thousand, five hundred five".