43223421 has 8 divisors (see below), whose sum is σ = 57890560. Its totient is φ = 28685952.

The previous prime is 43223407. The next prime is 43223429. The reversal of 43223421 is 12432234.

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

It is not a de Polignac number, because 43223421 - 2¹⁴ = 43207037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43223429) 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, 31636 + ... + 32973.

It is an arithmetic number, because the mean of its divisors is an integer number (7236320).

Almost surely, 2^43223421 is an apocalyptic number.

It is an amenable number.

43223421 is a deficient number, since it is larger than the sum of its proper divisors (14667139).

43223421 is a wasteful number, since it uses less digits than its factorization.

43223421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64835.

The product of its digits is 1152, while the sum is 21.

The square root of 43223421 is about 6574.4521444756. The cubic root of 43223421 is about 350.9455277031.

Adding to 43223421 its reverse (12432234), we get a palindrome (55655655).

The spelling of 43223421 in words is "forty-three million, two hundred twenty-three thousand, four hundred twenty-one".