43221405 has 8 divisors (see below), whose sum is σ = 69154272. Its totient is φ = 23051408.

The previous prime is 43221403. The next prime is 43221413. The reversal of 43221405 is 50412234.

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

It is a cyclic number.

It is not a de Polignac number, because 43221405 - 2¹ = 43221403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43221403) 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, 1440699 + ... + 1440728.

It is an arithmetic number, because the mean of its divisors is an integer number (8644284).

Almost surely, 2^43221405 is an apocalyptic number.

It is an amenable number.

43221405 is a deficient number, since it is larger than the sum of its proper divisors (25932867).

43221405 is a wasteful number, since it uses less digits than its factorization.

43221405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2881435.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 43221405 is about 6574.2988219277. The cubic root of 43221405 is about 350.9400714238.

Adding to 43221405 its reverse (50412234), we get a palindrome (93633639).

The spelling of 43221405 in words is "forty-three million, two hundred twenty-one thousand, four hundred five".