133831972 has 12 divisors (see below), whose sum is σ = 246532720. Its totient is φ = 63394056.

The previous prime is 133831937. The next prime is 133832003. The reversal of 133831972 is 279138331.

133831972 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, 880398 + ... + 880549.

Almost surely, 2^133831972 is an apocalyptic number.

It is an amenable number.

133831972 is a deficient number, since it is larger than the sum of its proper divisors (112700748).

133831972 is a wasteful number, since it uses less digits than its factorization.

133831972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1760970 (or 1760968 counting only the distinct ones).

The product of its digits is 27216, while the sum is 37.

The square root of 133831972 is about 11568.5769219900. The cubic root of 133831972 is about 511.5090151989.

The spelling of 133831972 in words is "one hundred thirty-three million, eight hundred thirty-one thousand, nine hundred seventy-two".