221048105 has 4 divisors (see below), whose sum is σ = 265257732. Its totient is φ = 176838480.

The previous prime is 221048099. The next prime is 221048119. The reversal of 221048105 is 501840122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 132894784 + 88153321 = 11528^2 + 9389^2 .

It is not a de Polignac number, because 221048105 - 2¹² = 221044009 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22104806 + ... + 22104815.

It is an arithmetic number, because the mean of its divisors is an integer number (66314433).

Almost surely, 2^221048105 is an apocalyptic number.

It is an amenable number.

221048105 is a deficient number, since it is larger than the sum of its proper divisors (44209627).

221048105 is an equidigital number, since it uses as much as digits as its factorization.

221048105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44209626.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 221048105 is about 14867.6866055214. The cubic root of 221048105 is about 604.6382237064.

Adding to 221048105 its reverse (501840122), we get a palindrome (722888227).

The spelling of 221048105 in words is "two hundred twenty-one million, forty-eight thousand, one hundred five".