43222217 has 2 divisors, whose sum is σ = 43222218. Its totient is φ = 43222216.

The previous prime is 43222213. The next prime is 43222219. The reversal of 43222217 is 71222234.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42981136 + 241081 = 6556^2 + 491^2 .

It is a cyclic number.

It is not a de Polignac number, because 43222217 - 2² = 43222213 is a prime.

Together with 43222219, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 43222192 and 43222201.

It is not a weakly prime, because it can be changed into another prime (43222213) 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, 21611108 + 21611109.

It is an arithmetic number, because the mean of its divisors is an integer number (21611109).

Almost surely, 2^43222217 is an apocalyptic number.

It is an amenable number.

43222217 is a deficient number, since it is larger than the sum of its proper divisors (1).

43222217 is an equidigital number, since it uses as much as digits as its factorization.

43222217 is an odious number, because the sum of its binary digits is odd.

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

The square root of 43222217 is about 6574.3605772729. The cubic root of 43222217 is about 350.9422691123.

The spelling of 43222217 in words is "forty-three million, two hundred twenty-two thousand, two hundred seventeen".