33443421 has 16 divisors (see below), whose sum is σ = 48755520. Its totient is φ = 20222720.

The previous prime is 33443419. The next prime is 33443429. The reversal of 33443421 is 12434433.

It is a cyclic number.

It is not a de Polignac number, because 33443421 - 2¹ = 33443419 is a prime.

It is a super-2 number, since 2×33443421² = 2236924816366482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33443391 and 33443400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33443429) 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 15 ways as a sum of consecutive naturals, for example, 18715 + ... + 20423.

It is an arithmetic number, because the mean of its divisors is an integer number (3047220).

Almost surely, 2^33443421 is an apocalyptic number.

It is an amenable number.

33443421 is a deficient number, since it is larger than the sum of its proper divisors (15312099).

33443421 is a wasteful number, since it uses less digits than its factorization.

33443421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2316.

The product of its digits is 3456, while the sum is 24.

The square root of 33443421 is about 5783.0287047532. The cubic root of 33443421 is about 322.1837004594.

Adding to 33443421 its reverse (12434433), we get a palindrome (45877854).

The spelling of 33443421 in words is "thirty-three million, four hundred forty-three thousand, four hundred twenty-one".