133912216 has 8 divisors (see below), whose sum is σ = 251085420. Its totient is φ = 66956104.

The previous prime is 133912199. The next prime is 133912217. The reversal of 133912216 is 612219331.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133912217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8369506 + ... + 8369521.

Almost surely, 2^133912216 is an apocalyptic number.

It is an amenable number.

133912216 is a deficient number, since it is larger than the sum of its proper divisors (117173204).

133912216 is a wasteful number, since it uses less digits than its factorization.

133912216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16739033 (or 16739029 counting only the distinct ones).

The product of its digits is 1944, while the sum is 28.

The square root of 133912216 is about 11572.0445903047. The cubic root of 133912216 is about 511.6112262726.

The spelling of 133912216 in words is "one hundred thirty-three million, nine hundred twelve thousand, two hundred sixteen".