221344233 has 24 divisors (see below), whose sum is σ = 342022560. Its totient is φ = 126251520.

The previous prime is 221344217. The next prime is 221344241. The reversal of 221344233 is 332443122.

It is not a de Polignac number, because 221344233 - 2⁴ = 221344217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221344283) 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, 2068 + ... + 21141.

It is an arithmetic number, because the mean of its divisors is an integer number (14250940).

Almost surely, 2^221344233 is an apocalyptic number.

It is an amenable number.

221344233 is a deficient number, since it is larger than the sum of its proper divisors (120678327).

221344233 is a wasteful number, since it uses less digits than its factorization.

221344233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23257 (or 23240 counting only the distinct ones).

The product of its digits is 3456, while the sum is 24.

The square root of 221344233 is about 14877.6420510779. The cubic root of 221344233 is about 604.9081052512.

Adding to 221344233 its reverse (332443122), we get a palindrome (553787355).

The spelling of 221344233 in words is "two hundred twenty-one million, three hundred forty-four thousand, two hundred thirty-three".