33161916 has 48 divisors (see below), whose sum is σ = 83672960. Its totient is φ = 10186560.

The previous prime is 33161893. The next prime is 33161927. The reversal of 33161916 is 61916133.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 6471 + ... + 10401.

Almost surely, 2^33161916 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 33161916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41836480).

33161916 is an abundant number, since it is smaller than the sum of its proper divisors (50511044).

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

33161916 is a wasteful number, since it uses less digits than its factorization.

33161916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3994 (or 3992 counting only the distinct ones).

The product of its digits is 2916, while the sum is 30.

The square root of 33161916 is about 5758.6383807286. The cubic root of 33161916 is about 321.2771744438.

The spelling of 33161916 in words is "thirty-three million, one hundred sixty-one thousand, nine hundred sixteen".