133144216 has 16 divisors (see below), whose sum is σ = 250309800. Its totient is φ = 66394944.

The previous prime is 133144169. The next prime is 133144243. The reversal of 133144216 is 612441331.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18925 + ... + 24988.

Almost surely, 2^133144216 is an apocalyptic number.

It is an amenable number.

133144216 is a deficient number, since it is larger than the sum of its proper divisors (117165584).

133144216 is a wasteful number, since it uses less digits than its factorization.

133144216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44298 (or 44294 counting only the distinct ones).

The product of its digits is 1728, while the sum is 25.

The square root of 133144216 is about 11538.8134571974. The cubic root of 133144216 is about 510.6313033145.

Adding to 133144216 its reverse (612441331), we get a palindrome (745585547).

The spelling of 133144216 in words is "one hundred thirty-three million, one hundred forty-four thousand, two hundred sixteen".