442424240021 has 8 divisors (see below), whose sum is σ = 446345111520. Its totient is φ = 438519471408.

The previous prime is 442424240017. The next prime is 442424240039. The reversal of 442424240021 is 120042424244.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 442424240021 - 2² = 442424240017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442424240221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3970526 + ... + 4080431.

It is an arithmetic number, because the mean of its divisors is an integer number (55793138940).

Almost surely, 2^442424240021 is an apocalyptic number.

It is an amenable number.

442424240021 is a deficient number, since it is larger than the sum of its proper divisors (3920871499).

442424240021 is a wasteful number, since it uses less digits than its factorization.

442424240021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8051443.

The product of its (nonzero) digits is 16384, while the sum is 29.

Adding to 442424240021 its reverse (120042424244), we get a palindrome (562466664265).

The spelling of 442424240021 in words is "four hundred forty-two billion, four hundred twenty-four million, two hundred forty thousand, twenty-one".