221333043 has 4 divisors (see below), whose sum is σ = 295110728. Its totient is φ = 147555360.

The previous prime is 221333041. The next prime is 221333053. The reversal of 221333043 is 340333122.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 221333043 - 2¹ = 221333041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221333041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36888838 + ... + 36888843.

It is an arithmetic number, because the mean of its divisors is an integer number (73777682).

Almost surely, 2^221333043 is an apocalyptic number.

221333043 is a deficient number, since it is larger than the sum of its proper divisors (73777685).

221333043 is an equidigital number, since it uses as much as digits as its factorization.

221333043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73777684.

The product of its (nonzero) digits is 1296, while the sum is 21.

The square root of 221333043 is about 14877.2659786669. The cubic root of 221333043 is about 604.8979114223.

Adding to 221333043 its reverse (340333122), we get a palindrome (561666165).

The spelling of 221333043 in words is "two hundred twenty-one million, three hundred thirty-three thousand, forty-three".