442220817819 has 16 divisors (see below), whose sum is σ = 643760619264. Its totient is φ = 267791642400.

The previous prime is 442220817781. The next prime is 442220817869. The reversal of 442220817819 is 918718022244.

It is not a de Polignac number, because 442220817819 - 2¹⁶ = 442220752283 is a prime.

It is a super-2 number, since 2×442220817819² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (442220817869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5483727 + ... + 5563784.

It is an arithmetic number, because the mean of its divisors is an integer number (40235038704).

Almost surely, 2^442220817819 is an apocalyptic number.

442220817819 is a deficient number, since it is larger than the sum of its proper divisors (201539801445).

442220817819 is a wasteful number, since it uses less digits than its factorization.

442220817819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11048738.

The product of its (nonzero) digits is 516096, while the sum is 48.

The spelling of 442220817819 in words is "four hundred forty-two billion, two hundred twenty million, eight hundred seventeen thousand, eight hundred nineteen".