442200217 has 2 divisors, whose sum is σ = 442200218. Its totient is φ = 442200216.

The previous prime is 442200193. The next prime is 442200229. The reversal of 442200217 is 712002244.

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., 318122896 + 124077321 = 17836^2 + 11139^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442200217 is a prime.

It is not a weakly prime, because it can be changed into another prime (442300217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221100108 + 221100109.

It is an arithmetic number, because the mean of its divisors is an integer number (221100109).

Almost surely, 2^442200217 is an apocalyptic number.

It is an amenable number.

442200217 is a deficient number, since it is larger than the sum of its proper divisors (1).

442200217 is an equidigital number, since it uses as much as digits as its factorization.

442200217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 896, while the sum is 22.

The square root of 442200217 is about 21028.5571782755. The cubic root of 442200217 is about 761.8561606918.

The spelling of 442200217 in words is "four hundred forty-two million, two hundred thousand, two hundred seventeen".