442248209 has 16 divisors (see below), whose sum is σ = 502588800. Its totient is φ = 386069376.

The previous prime is 442248203. The next prime is 442248211. The reversal of 442248209 is 902842244.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442248209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442248203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18302 + ... + 34920.

It is an arithmetic number, because the mean of its divisors is an integer number (31411800).

Almost surely, 2^442248209 is an apocalyptic number.

It is an amenable number.

442248209 is a deficient number, since it is larger than the sum of its proper divisors (60340591).

442248209 is a wasteful number, since it uses less digits than its factorization.

442248209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16744.

The product of its (nonzero) digits is 36864, while the sum is 35.

The square root of 442248209 is about 21029.6982622196. The cubic root of 442248209 is about 761.8837211172.

The spelling of 442248209 in words is "four hundred forty-two million, two hundred forty-eight thousand, two hundred nine".