43221147 has 4 divisors (see below), whose sum is σ = 57628200. Its totient is φ = 28814096.

The previous prime is 43221131. The next prime is 43221151. The reversal of 43221147 is 74112234.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 43221147 - 2⁴ = 43221131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (43221187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7203522 + ... + 7203527.

It is an arithmetic number, because the mean of its divisors is an integer number (14407050).

Almost surely, 2^43221147 is an apocalyptic number.

43221147 is a deficient number, since it is larger than the sum of its proper divisors (14407053).

43221147 is a wasteful number, since it uses less digits than its factorization.

43221147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14407052.

The product of its digits is 1344, while the sum is 24.

The square root of 43221147 is about 6574.2792000340. The cubic root of 43221147 is about 350.9393731377.

The spelling of 43221147 in words is "forty-three million, two hundred twenty-one thousand, one hundred forty-seven".