221304134 has 8 divisors (see below), whose sum is σ = 349427640. Its totient is φ = 104828256.

The previous prime is 221304131. The next prime is 221304151. The reversal of 221304134 is 431403122.

221304134 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a plaindrome in base 15.

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 3 ways as a sum of consecutive naturals, for example, 2911859 + ... + 2911934.

It is an arithmetic number, because the mean of its divisors is an integer number (43678455).

Almost surely, 2^221304134 is an apocalyptic number.

221304134 is a deficient number, since it is larger than the sum of its proper divisors (128123506).

221304134 is a wasteful number, since it uses less digits than its factorization.

221304134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5823814.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 221304134 is about 14876.2943638528. The cubic root of 221304134 is about 604.8715744071.

Adding to 221304134 its reverse (431403122), we get a palindrome (652707256).

The spelling of 221304134 in words is "two hundred twenty-one million, three hundred four thousand, one hundred thirty-four".