442023321 has 8 divisors (see below), whose sum is σ = 598161184. Its totient is φ = 290283840.

The previous prime is 442023301. The next prime is 442023347. The reversal of 442023321 is 123320244.

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

It is not a de Polignac number, because 442023321 - 2⁷ = 442023193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442023301) 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, 1099360 + ... + 1099761.

It is an arithmetic number, because the mean of its divisors is an integer number (74770148).

Almost surely, 2^442023321 is an apocalyptic number.

It is an amenable number.

442023321 is a deficient number, since it is larger than the sum of its proper divisors (156137863).

442023321 is a wasteful number, since it uses less digits than its factorization.

442023321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2199191.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 442023321 is about 21024.3506677376. The cubic root of 442023321 is about 761.7545571820.

Adding to 442023321 its reverse (123320244), we get a palindrome (565343565).

The spelling of 442023321 in words is "four hundred forty-two million, twenty-three thousand, three hundred twenty-one".