133383831 has 24 divisors (see below), whose sum is σ = 215881344. Its totient is φ = 72903600.

The previous prime is 133383799. The next prime is 133383839. The reversal of 133383831 is 138383331.

It is not a de Polignac number, because 133383831 - 2⁵ = 133383799 is a prime.

It is a super-3 number, since 3×133383831³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 133383792 and 133383801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133383839) 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 in 23 ways as a sum of consecutive naturals, for example, 16345 + ... + 23106.

It is an arithmetic number, because the mean of its divisors is an integer number (8995056).

Almost surely, 2^133383831 is an apocalyptic number.

133383831 is a deficient number, since it is larger than the sum of its proper divisors (82497513).

133383831 is a wasteful number, since it uses less digits than its factorization.

133383831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39491 (or 39484 counting only the distinct ones).

The product of its digits is 15552, while the sum is 33.

The square root of 133383831 is about 11549.1917899046. The cubic root of 133383831 is about 510.9374415191.

The spelling of 133383831 in words is "one hundred thirty-three million, three hundred eighty-three thousand, eight hundred thirty-one".