133507216 has 20 divisors (see below), whose sum is σ = 259661952. Its totient is φ = 66497696.

The previous prime is 133507207. The next prime is 133507219. The reversal of 133507216 is 612705331.

133507216 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (133507219) 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, 11656 + ... + 20071.

Almost surely, 2^133507216 is an apocalyptic number.

133507216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

133507216 is a deficient number, since it is larger than the sum of its proper divisors (126154736).

133507216 is a wasteful number, since it uses less digits than its factorization.

133507216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31998 (or 31992 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 133507216 is about 11554.5322709316. The cubic root of 133507216 is about 511.0949383386.

The spelling of 133507216 in words is "one hundred thirty-three million, five hundred seven thousand, two hundred sixteen".