221103345 has 16 divisors (see below), whose sum is σ = 359566272. Its totient is φ = 115988160.

The previous prime is 221103329. The next prime is 221103353. The reversal of 221103345 is 543301122.

It is not a de Polignac number, because 221103345 - 2⁴ = 221103329 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119907 + ... + 121736.

It is an arithmetic number, because the mean of its divisors is an integer number (22472892).

Almost surely, 2^221103345 is an apocalyptic number.

It is an amenable number.

221103345 is a deficient number, since it is larger than the sum of its proper divisors (138462927).

221103345 is a wasteful number, since it uses less digits than its factorization.

221103345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241712.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 221103345 is about 14869.5442095580. The cubic root of 221103345 is about 604.6885859471.

Adding to 221103345 its reverse (543301122), we get a palindrome (764404467).

The spelling of 221103345 in words is "two hundred twenty-one million, one hundred three thousand, three hundred forty-five".