442633321 has 8 divisors (see below), whose sum is σ = 497407680. Its totient is φ = 390819792.

The previous prime is 442633319. The next prime is 442633327. The reversal of 442633321 is 123336244.

442633321 = 205² + 206² + ... + 1101².

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 442633321 - 2¹ = 442633319 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 442633321.

It is not an unprimeable number, because it can be changed into a prime (442633327) 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, 739891 + ... + 740488.

It is an arithmetic number, because the mean of its divisors is an integer number (62175960).

Almost surely, 2^442633321 is an apocalyptic number.

It is an amenable number.

442633321 is a deficient number, since it is larger than the sum of its proper divisors (54774359).

442633321 is a wasteful number, since it uses less digits than its factorization.

442633321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1480415.

The product of its digits is 10368, while the sum is 28.

The square root of 442633321 is about 21038.8526540779. The cubic root of 442633321 is about 762.1048077008.

Adding to 442633321 its reverse (123336244), we get a palindrome (565969565).

The spelling of 442633321 in words is "four hundred forty-two million, six hundred thirty-three thousand, three hundred twenty-one".