33543424421 has 8 divisors (see below), whose sum is σ = 38248610904. Its totient is φ = 29141798400.

The previous prime is 33543424417. The next prime is 33543424513. The reversal of 33543424421 is 12442434533.

It can be written as a sum of positive squares in 4 ways, for example, as 8528522500 + 25014901921 = 92350^2 + 158161^2 .

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

It is not a de Polignac number, because 33543424421 - 2² = 33543424417 is a prime.

It is a super-2 number, since 2×33543424421² (a number of 22 digits) 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 (33543424021) 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, 75889880 + ... + 75890321.

It is an arithmetic number, because the mean of its divisors is an integer number (4781076363).

Almost surely, 2^33543424421 is an apocalyptic number.

It is an amenable number.

33543424421 is a deficient number, since it is larger than the sum of its proper divisors (4705186483).

33543424421 is a wasteful number, since it uses less digits than its factorization.

33543424421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151780231.

The product of its digits is 138240, while the sum is 35.

Adding to 33543424421 its reverse (12442434533), we get a palindrome (45985858954).

The spelling of 33543424421 in words is "thirty-three billion, five hundred forty-three million, four hundred twenty-four thousand, four hundred twenty-one".