442424315521 has 8 divisors (see below), whose sum is σ = 454826804264. Its totient is φ = 430045251840.

The previous prime is 442424315513. The next prime is 442424315533. The reversal of 442424315521 is 125513424244.

It can be written as a sum of positive squares in 4 ways, for example, as 244723143025 + 197701172496 = 494695^2 + 444636^2 .

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 442424315521 - 2³ = 442424315513 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442424385521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5817960 + ... + 5893513.

It is an arithmetic number, because the mean of its divisors is an integer number (56853350533).

Almost surely, 2^442424315521 is an apocalyptic number.

It is an amenable number.

442424315521 is a deficient number, since it is larger than the sum of its proper divisors (12402488743).

442424315521 is a wasteful number, since it uses less digits than its factorization.

442424315521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11712531.

The product of its digits is 153600, while the sum is 37.

Adding to 442424315521 its reverse (125513424244), we get a palindrome (567937739765).

The spelling of 442424315521 in words is "four hundred forty-two billion, four hundred twenty-four million, three hundred fifteen thousand, five hundred twenty-one".