43226221 has 4 divisors (see below), whose sum is σ = 43243200. Its totient is φ = 43209244.

The previous prime is 43226213. The next prime is 43226233. The reversal of 43226221 is 12262234.

43226221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 43226221 - 2³ = 43226213 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is a zygodrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 43226192 and 43226201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43221221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3811 + ... + 10048.

It is an arithmetic number, because the mean of its divisors is an integer number (10810800).

Almost surely, 2^43226221 is an apocalyptic number.

It is an amenable number.

43226221 is a deficient number, since it is larger than the sum of its proper divisors (16979).

43226221 is a wasteful number, since it uses less digits than its factorization.

43226221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16978.

The product of its digits is 1152, while the sum is 22.

The square root of 43226221 is about 6574.6650865272. The cubic root of 43226221 is about 350.9531055875.

Adding to 43226221 its reverse (12262234), we get a palindrome (55488455).

The spelling of 43226221 in words is "forty-three million, two hundred twenty-six thousand, two hundred twenty-one".