221333241 has 4 divisors (see below), whose sum is σ = 295110992. Its totient is φ = 147555492.

The previous prime is 221333237. The next prime is 221333257. The reversal of 221333241 is 142333122.

221333241 is nontrivially palindromic in base 6.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 221333241 - 2² = 221333237 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221333201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36888871 + ... + 36888876.

It is an arithmetic number, because the mean of its divisors is an integer number (73777748).

Almost surely, 2^221333241 is an apocalyptic number.

It is an amenable number.

221333241 is a deficient number, since it is larger than the sum of its proper divisors (73777751).

221333241 is an equidigital number, since it uses as much as digits as its factorization.

221333241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73777750.

The product of its digits is 864, while the sum is 21.

The square root of 221333241 is about 14877.2726331139. The cubic root of 221333241 is about 604.8980917986.

Adding to 221333241 its reverse (142333122), we get a palindrome (363666363).

The spelling of 221333241 in words is "two hundred twenty-one million, three hundred thirty-three thousand, two hundred forty-one".