33131172 has 12 divisors (see below), whose sum is σ = 77306096. Its totient is φ = 11043720.

The previous prime is 33131149. The next prime is 33131173. The reversal of 33131172 is 27113133.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (33131173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1380454 + ... + 1380477.

Almost surely, 2^33131172 is an apocalyptic number.

It is an amenable number.

33131172 is an abundant number, since it is smaller than the sum of its proper divisors (44174924).

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

33131172 is a wasteful number, since it uses less digits than its factorization.

33131172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2760938 (or 2760936 counting only the distinct ones).

The product of its digits is 378, while the sum is 21.

The square root of 33131172 is about 5755.9683807332. The cubic root of 33131172 is about 321.1778597217.

The spelling of 33131172 in words is "thirty-three million, one hundred thirty-one thousand, one hundred seventy-two".