33144021 has 12 divisors (see below), whose sum is σ = 47961472. Its totient is φ = 22055976.

The previous prime is 33144019. The next prime is 33144073. The reversal of 33144021 is 12044133.

It is not a de Polignac number, because 33144021 - 2¹ = 33144019 is a prime.

It is a super-2 number, since 2×33144021² = 2197052256096882, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 33143985 and 33144003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33144011) 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 11 ways as a sum of consecutive naturals, for example, 2430 + ... + 8496.

Almost surely, 2^33144021 is an apocalyptic number.

It is an amenable number.

33144021 is a deficient number, since it is larger than the sum of its proper divisors (14817451).

33144021 is a wasteful number, since it uses less digits than its factorization.

33144021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6680 (or 6677 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 33144021 is about 5757.0844183493. The cubic root of 33144021 is about 321.2193743105.

Adding to 33144021 its reverse (12044133), we get a palindrome (45188154).

The spelling of 33144021 in words is "thirty-three million, one hundred forty-four thousand, twenty-one".