33166221 has 12 divisors (see below), whose sum is σ = 48607776. Its totient is φ = 20100520.

The previous prime is 33166183. The next prime is 33166223. The reversal of 33166221 is 12266133.

It is a happy number.

It is not a de Polignac number, because 33166221 - 2⁹ = 33165709 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 33166191 and 33166200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33166223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45321 + ... + 46046.

It is an arithmetic number, because the mean of its divisors is an integer number (4050648).

Almost surely, 2^33166221 is an apocalyptic number.

It is an amenable number.

33166221 is a deficient number, since it is larger than the sum of its proper divisors (15441555).

33166221 is a wasteful number, since it uses less digits than its factorization.

33166221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91392 (or 91381 counting only the distinct ones).

The product of its digits is 1296, while the sum is 24.

The square root of 33166221 is about 5759.0121548752. The cubic root of 33166221 is about 321.2910763183.

The spelling of 33166221 in words is "thirty-three million, one hundred sixty-six thousand, two hundred twenty-one".