43243217 has 2 divisors, whose sum is σ = 43243218. Its totient is φ = 43243216.

The previous prime is 43243201. The next prime is 43243219. The reversal of 43243217 is 71234234.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36529936 + 6713281 = 6044^2 + 2591^2 .

It is a cyclic number.

It is not a de Polignac number, because 43243217 - 2⁴ = 43243201 is a prime.

Together with 43243219, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43243219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21621608 + 21621609.

It is an arithmetic number, because the mean of its divisors is an integer number (21621609).

Almost surely, 2^43243217 is an apocalyptic number.

It is an amenable number.

43243217 is a deficient number, since it is larger than the sum of its proper divisors (1).

43243217 is an equidigital number, since it uses as much as digits as its factorization.

43243217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 26.

The square root of 43243217 is about 6575.9574968213. The cubic root of 43243217 is about 350.9990963254. Note that the first 3 decimals are identical.

The spelling of 43243217 in words is "forty-three million, two hundred forty-three thousand, two hundred seventeen".