221113233 has 24 divisors (see below), whose sum is σ = 361329696. Its totient is φ = 134006400.

The previous prime is 221113231. The next prime is 221113247. The reversal of 221113233 is 332311122.

It is not a de Polignac number, because 221113233 - 2¹ = 221113231 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221113231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38688 + ... + 44033.

It is an arithmetic number, because the mean of its divisors is an integer number (15055404).

Almost surely, 2^221113233 is an apocalyptic number.

It is an amenable number.

221113233 is a deficient number, since it is larger than the sum of its proper divisors (140216463).

221113233 is an equidigital number, since it uses as much as digits as its factorization.

221113233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82747 (or 82735 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 221113233 is about 14869.8766975386. The cubic root of 221113233 is about 604.6975999395.

Adding to 221113233 its reverse (332311122), we get a palindrome (553424355).

The spelling of 221113233 in words is "two hundred twenty-one million, one hundred thirteen thousand, two hundred thirty-three".