33444221 has 4 divisors (see below), whose sum is σ = 34597500. Its totient is φ = 32290944.

The previous prime is 33444211. The next prime is 33444227. The reversal of 33444221 is 12244433.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15288100 + 18156121 = 3910^2 + 4261^2 .

It is a cyclic number.

It is not a de Polignac number, because 33444221 - 2⁶ = 33444157 is a prime.

It is a super-2 number, since 2×33444221² = 2237031836593682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33444227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 576596 + ... + 576653.

It is an arithmetic number, because the mean of its divisors is an integer number (8649375).

Almost surely, 2^33444221 is an apocalyptic number.

It is an amenable number.

33444221 is a deficient number, since it is larger than the sum of its proper divisors (1153279).

33444221 is a wasteful number, since it uses less digits than its factorization.

33444221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1153278.

The product of its digits is 2304, while the sum is 23.

The square root of 33444221 is about 5783.0978722481. The cubic root of 33444221 is about 322.1862694241.

Adding to 33444221 its reverse (12244433), we get a palindrome (45688654).

The spelling of 33444221 in words is "thirty-three million, four hundred forty-four thousand, two hundred twenty-one".