133331312 has 20 divisors (see below), whose sum is σ = 260890296. Its totient is φ = 66004800.

The previous prime is 133331291. The next prime is 133331321. The reversal of 133331312 is 213133331.

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, 39638 + ... + 42869.

Almost surely, 2^133331312 is an apocalyptic number.

It is an amenable number.

133331312 is a deficient number, since it is larger than the sum of its proper divisors (127558984).

133331312 is a wasteful number, since it uses less digits than its factorization.

133331312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82616 (or 82610 counting only the distinct ones).

The product of its digits is 486, while the sum is 20.

The square root of 133331312 is about 11546.9178571600. The cubic root of 133331312 is about 510.8703733047.

Adding to 133331312 its reverse (213133331), we get a palindrome (346464643).

The spelling of 133331312 in words is "one hundred thirty-three million, three hundred thirty-one thousand, three hundred twelve".