442231430321 has 4 divisors (see below), whose sum is σ = 442274954352. Its totient is φ = 442187906292.

The previous prime is 442231430233. The next prime is 442231430357. The reversal of 442231430321 is 123034132244.

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 a de Polignac number, because none of the positive numbers 2^k-442231430321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442231433321) 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, 21746771 + ... + 21767096.

It is an arithmetic number, because the mean of its divisors is an integer number (110568738588).

Almost surely, 2^442231430321 is an apocalyptic number.

It is an amenable number.

442231430321 is a deficient number, since it is larger than the sum of its proper divisors (43524031).

442231430321 is a wasteful number, since it uses less digits than its factorization.

442231430321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43524030.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 442231430321 its reverse (123034132244), we get a palindrome (565265562565).

The spelling of 442231430321 in words is "four hundred forty-two billion, two hundred thirty-one million, four hundred thirty thousand, three hundred twenty-one".