220999105 has 8 divisors (see below), whose sum is σ = 268832232. Its totient is φ = 174377088.

The previous prime is 220999081. The next prime is 220999109. The reversal of 220999105 is 501999022.

It can be written as a sum of positive squares in 4 ways, for example, as 10284849 + 210714256 = 3207^2 + 14516^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 220999105 - 2¹⁵ = 220966337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220999109) by changing a digit.

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, 302374 + ... + 303103.

It is an arithmetic number, because the mean of its divisors is an integer number (33604029).

Almost surely, 2^220999105 is an apocalyptic number.

It is an amenable number.

220999105 is a deficient number, since it is larger than the sum of its proper divisors (47833127).

220999105 is an equidigital number, since it uses as much as digits as its factorization.

220999105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605555.

The product of its (nonzero) digits is 14580, while the sum is 37.

The square root of 220999105 is about 14866.0386451805. The cubic root of 220999105 is about 604.5935434434.

The spelling of 220999105 in words is "two hundred twenty million, nine hundred ninety-nine thousand, one hundred five".