442344432021 has 4 divisors (see below), whose sum is σ = 589792576032. Its totient is φ = 294896288012.

The previous prime is 442344432001. The next prime is 442344432029. The reversal of 442344432021 is 120234443244.

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 442344432021 - 2²⁷ = 442210214293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442344432029) 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, 73724072001 + ... + 73724072006.

It is an arithmetic number, because the mean of its divisors is an integer number (147448144008).

Almost surely, 2^442344432021 is an apocalyptic number.

It is an amenable number.

442344432021 is a deficient number, since it is larger than the sum of its proper divisors (147448144011).

442344432021 is a wasteful number, since it uses less digits than its factorization.

442344432021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147448144010.

The product of its (nonzero) digits is 73728, while the sum is 33.

Adding to 442344432021 its reverse (120234443244), we get a palindrome (562578875265).

The spelling of 442344432021 in words is "four hundred forty-two billion, three hundred forty-four million, four hundred thirty-two thousand, twenty-one".