133216304 has 20 divisors (see below), whose sum is σ = 277961376. Its totient is φ = 61484352.

The previous prime is 133216289. The next prime is 133216309. The reversal of 133216304 is 403612331.

It is a self number, because there is not a number n which added to its sum of digits gives 133216304.

It is not an unprimeable number, because it can be changed into a prime (133216309) 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, 320024 + ... + 320439.

Almost surely, 2^133216304 is an apocalyptic number.

It is an amenable number.

133216304 is an abundant number, since it is smaller than the sum of its proper divisors (144745072).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133216304 is a wasteful number, since it uses less digits than its factorization.

133216304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640484 (or 640478 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 133216304 is about 11541.9367525559. The cubic root of 133216304 is about 510.7234433741.

Adding to 133216304 its reverse (403612331), we get a palindrome (536828635).

The spelling of 133216304 in words is "one hundred thirty-three million, two hundred sixteen thousand, three hundred four".