33171980 has 48 divisors (see below), whose sum is σ = 74692800. Its totient is φ = 12342528.

The previous prime is 33171973. The next prime is 33171997. The reversal of 33171980 is 8917133.

It is a super-2 number, since 2×33171980² = 2200760514240800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16046 + ... + 17994.

It is an arithmetic number, because the mean of its divisors is an integer number (1556100).

Almost surely, 2^33171980 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 33171980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37346400).

33171980 is an abundant number, since it is smaller than the sum of its proper divisors (41520820).

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

33171980 is a wasteful number, since it uses less digits than its factorization.

33171980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2018 (or 2016 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 33171980 is about 5759.5121321167. The cubic root of 33171980 is about 321.3096716257.

The spelling of 33171980 in words is "thirty-three million, one hundred seventy-one thousand, nine hundred eighty".