33144221 has 8 divisors (see below), whose sum is σ = 36531264. Its totient is φ = 29819520.

The previous prime is 33144197. The next prime is 33144247. The reversal of 33144221 is 12244133.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 33144221 - 2¹⁰ = 33143197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 33144193 and 33144202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33144121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14465 + ... + 16598.

It is an arithmetic number, because the mean of its divisors is an integer number (4566408).

Almost surely, 2^33144221 is an apocalyptic number.

It is an amenable number.

33144221 is a deficient number, since it is larger than the sum of its proper divisors (3387043).

33144221 is a wasteful number, since it uses less digits than its factorization.

33144221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31171.

The product of its digits is 576, while the sum is 20.

The square root of 33144221 is about 5757.1017882264. The cubic root of 33144221 is about 321.2200204174.

Adding to 33144221 its reverse (12244133), we get a palindrome (45388354).

The spelling of 33144221 in words is "thirty-three million, one hundred forty-four thousand, two hundred twenty-one".