33919221 has 12 divisors (see below), whose sum is σ = 52609632. Its totient is φ = 19382328.

The previous prime is 33919213. The next prime is 33919243. The reversal of 33919221 is 12291933.

It is a happy number.

It is not a de Polignac number, because 33919221 - 2³ = 33919213 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33919211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 115225 + ... + 115518.

It is an arithmetic number, because the mean of its divisors is an integer number (4384136).

Almost surely, 2^33919221 is an apocalyptic number.

It is an amenable number.

33919221 is a deficient number, since it is larger than the sum of its proper divisors (18690411).

33919221 is a wasteful number, since it uses less digits than its factorization.

33919221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230760 (or 230753 counting only the distinct ones).

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

The square root of 33919221 is about 5824.0210336159. The cubic root of 33919221 is about 323.7044153009.

The spelling of 33919221 in words is "thirty-three million, nine hundred nineteen thousand, two hundred twenty-one".