43321031421 has 8 divisors (see below), whose sum is σ = 59104663200. Its totient is φ = 28209043632.

The previous prime is 43321031417. The next prime is 43321031441. The reversal of 43321031421 is 12413012334.

It is a happy number.

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

It is not a de Polignac number, because 43321031421 - 2² = 43321031417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43321031391 and 43321031400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43321031441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167910846 + ... + 167911103.

It is an arithmetic number, because the mean of its divisors is an integer number (7388082900).

Almost surely, 2^43321031421 is an apocalyptic number.

It is an amenable number.

43321031421 is a deficient number, since it is larger than the sum of its proper divisors (15783631779).

43321031421 is a wasteful number, since it uses less digits than its factorization.

43321031421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335821995.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 43321031421 its reverse (12413012334), we get a palindrome (55734043755).

The spelling of 43321031421 in words is "forty-three billion, three hundred twenty-one million, thirty-one thousand, four hundred twenty-one".