42244217 has 2 divisors, whose sum is σ = 42244218. Its totient is φ = 42244216.

The previous prime is 42244199. The next prime is 42244229. The reversal of 42244217 is 71244224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34058896 + 8185321 = 5836^2 + 2861^2 .

It is a cyclic number.

It is not a de Polignac number, because 42244217 - 2¹⁰ = 42243193 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42244247) 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, 21122108 + 21122109.

It is an arithmetic number, because the mean of its divisors is an integer number (21122109).

Almost surely, 2^42244217 is an apocalyptic number.

It is an amenable number.

42244217 is a deficient number, since it is larger than the sum of its proper divisors (1).

42244217 is an equidigital number, since it uses as much as digits as its factorization.

42244217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3584, while the sum is 26.

The square root of 42244217 is about 6499.5551386230. Note that the first 3 decimals coincide. The cubic root of 42244217 is about 348.2750968068.

The spelling of 42244217 in words is "forty-two million, two hundred forty-four thousand, two hundred seventeen".