43221047 has 2 divisors, whose sum is σ = 43221048. Its totient is φ = 43221046.

The previous prime is 43221043. The next prime is 43221083. The reversal of 43221047 is 74012234.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43221047 - 2² = 43221043 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43221041) 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 as a sum of consecutive naturals, namely, 21610523 + 21610524.

It is an arithmetic number, because the mean of its divisors is an integer number (21610524).

Almost surely, 2^43221047 is an apocalyptic number.

43221047 is a deficient number, since it is larger than the sum of its proper divisors (1).

43221047 is an equidigital number, since it uses as much as digits as its factorization.

43221047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 43221047 is about 6574.2715946331. The cubic root of 43221047 is about 350.9391024834.

The spelling of 43221047 in words is "forty-three million, two hundred twenty-one thousand, forty-seven".