43221772 has 48 divisors (see below), whose sum is σ = 85800960. Its totient is φ = 18878400.

The previous prime is 43221757. The next prime is 43221779. The reversal of 43221772 is 27712234.

It is a self number, because there is not a number n which added to its sum of digits gives 43221772.

It is not an unprimeable number, because it can be changed into a prime (43221779) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 226197 + ... + 226387.

It is an arithmetic number, because the mean of its divisors is an integer number (1787520).

Almost surely, 2^43221772 is an apocalyptic number.

It is an amenable number.

43221772 is a deficient number, since it is larger than the sum of its proper divisors (42579188).

43221772 is a wasteful number, since it uses less digits than its factorization.

43221772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382 (or 380 counting only the distinct ones).

The product of its digits is 4704, while the sum is 28.

The square root of 43221772 is about 6574.3267335903. The cubic root of 43221772 is about 350.9410647174.

The spelling of 43221772 in words is "forty-three million, two hundred twenty-one thousand, seven hundred seventy-two".