221052205 has 8 divisors (see below), whose sum is σ = 289377504. Its totient is φ = 160765200.

The previous prime is 221052203. The next prime is 221052217. The reversal of 221052205 is 502250122.

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

It is not a de Polignac number, because 221052205 - 2¹ = 221052203 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221052203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2009511 + ... + 2009620.

It is an arithmetic number, because the mean of its divisors is an integer number (36172188).

Almost surely, 2^221052205 is an apocalyptic number.

It is an amenable number.

221052205 is a deficient number, since it is larger than the sum of its proper divisors (68325299).

221052205 is a wasteful number, since it uses less digits than its factorization.

221052205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4019147.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 221052205 is about 14867.8244877991. The cubic root of 221052205 is about 604.6419619596.

It can be divided in two parts, 22105 and 2205, that added together give a triangular number (24310 = T₂₂₀).

The spelling of 221052205 in words is "two hundred twenty-one million, fifty-two thousand, two hundred five".