221105266 has 16 divisors (see below), whose sum is σ = 341541720. Its totient is φ = 107274240.

The previous prime is 221105263. The next prime is 221105321. The reversal of 221105266 is 662501122.

221105266 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 212314041 + 8791225 = 14571^2 + 2965^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 221105266.

It is not an unprimeable number, because it can be changed into a prime (221105263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24946 + ... + 32626.

Almost surely, 2^221105266 is an apocalyptic number.

221105266 is a deficient number, since it is larger than the sum of its proper divisors (120436454).

221105266 is a wasteful number, since it uses less digits than its factorization.

221105266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8109.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 221105266 is about 14869.6088045382. The cubic root of 221105266 is about 604.6903371695.

Adding to 221105266 its reverse (662501122), we get a palindrome (883606388).

The spelling of 221105266 in words is "two hundred twenty-one million, one hundred five thousand, two hundred sixty-six".