33243443421 has 4 divisors (see below), whose sum is σ = 44324591232. Its totient is φ = 22162295612.

The previous prime is 33243443383. The next prime is 33243443479. The reversal of 33243443421 is 12434434233.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 33243443421 - 2⁷ = 33243443293 is a prime.

It is a super-2 number, since 2×33243443421² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33243443221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5540573901 + ... + 5540573906.

It is an arithmetic number, because the mean of its divisors is an integer number (11081147808).

Almost surely, 2^33243443421 is an apocalyptic number.

It is an amenable number.

33243443421 is a deficient number, since it is larger than the sum of its proper divisors (11081147811).

33243443421 is a wasteful number, since it uses less digits than its factorization.

33243443421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11081147810.

The product of its digits is 82944, while the sum is 33.

Adding to 33243443421 its reverse (12434434233), we get a palindrome (45677877654).

The spelling of 33243443421 in words is "thirty-three billion, two hundred forty-three million, four hundred forty-three thousand, four hundred twenty-one".