43221726 has 12 divisors (see below), whose sum is σ = 93647112. Its totient is φ = 14407236.

The previous prime is 43221707. The next prime is 43221727. The reversal of 43221726 is 62712234.

43221726 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 43221726.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43221727) 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 5 ways as a sum of consecutive naturals, for example, 1200586 + ... + 1200621.

It is an arithmetic number, because the mean of its divisors is an integer number (7803926).

Almost surely, 2^43221726 is an apocalyptic number.

43221726 is an abundant number, since it is smaller than the sum of its proper divisors (50425386).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

43221726 is a wasteful number, since it uses less digits than its factorization.

43221726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2401215 (or 2401212 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 43221726 is about 6574.3232351323. The cubic root of 43221726 is about 350.9409402177.

Adding to 43221726 its sum of digits (27), we get a triangular number (43221753 = T₉₂₉₇).

The spelling of 43221726 in words is "forty-three million, two hundred twenty-one thousand, seven hundred twenty-six".