133123312 has 20 divisors (see below), whose sum is σ = 294773296. Its totient is φ = 57052800.

The previous prime is 133123279. The next prime is 133123321. The reversal of 133123312 is 213321331.

It is a self number, because there is not a number n which added to its sum of digits gives 133123312.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 594189 + ... + 594412.

Almost surely, 2^133123312 is an apocalyptic number.

It is an amenable number.

133123312 is an abundant number, since it is smaller than the sum of its proper divisors (161649984).

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

133123312 is a wasteful number, since it uses less digits than its factorization.

133123312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1188616 (or 1188610 counting only the distinct ones).

The product of its digits is 324, while the sum is 19.

The square root of 133123312 is about 11537.9076092678. The cubic root of 133123312 is about 510.6045784198.

Adding to 133123312 its reverse (213321331), we get a palindrome (346444643).

The spelling of 133123312 in words is "one hundred thirty-three million, one hundred twenty-three thousand, three hundred twelve".