221304133 has 8 divisors (see below), whose sum is σ = 236321280. Its totient is φ = 206779440.

The previous prime is 221304131. The next prime is 221304151. The reversal of 221304133 is 331403122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221304133 - 2¹ = 221304131 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 221304133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221304131) 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 7 ways as a sum of consecutive naturals, for example, 122185 + ... + 123982.

It is an arithmetic number, because the mean of its divisors is an integer number (29540160).

Almost surely, 2^221304133 is an apocalyptic number.

It is an amenable number.

221304133 is a deficient number, since it is larger than the sum of its proper divisors (15017147).

221304133 is a wasteful number, since it uses less digits than its factorization.

221304133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246227.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 221304133 is about 14876.2943302423. The cubic root of 221304133 is about 604.8715734960.

Adding to 221304133 its reverse (331403122), we get a palindrome (552707255).

The spelling of 221304133 in words is "two hundred twenty-one million, three hundred four thousand, one hundred thirty-three".