442031355521 has 4 divisors (see below), whose sum is σ = 505178692032. Its totient is φ = 378884019012.

The previous prime is 442031355511. The next prime is 442031355529. The reversal of 442031355521 is 125553130244.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 442031355521 - 2²² = 442027161217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (442031355529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31573668245 + ... + 31573668258.

It is an arithmetic number, because the mean of its divisors is an integer number (126294673008).

Almost surely, 2^442031355521 is an apocalyptic number.

It is an amenable number.

442031355521 is a deficient number, since it is larger than the sum of its proper divisors (63147336511).

442031355521 is an equidigital number, since it uses as much as digits as its factorization.

442031355521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63147336510.

The product of its (nonzero) digits is 72000, while the sum is 35.

Adding to 442031355521 its reverse (125553130244), we get a palindrome (567584485765).

The spelling of 442031355521 in words is "four hundred forty-two billion, thirty-one million, three hundred fifty-five thousand, five hundred twenty-one".