442440233 has 4 divisors (see below), whose sum is σ = 449939280. Its totient is φ = 434941188.

The previous prime is 442440221. The next prime is 442440241. The reversal of 442440233 is 332044244.

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 442440233 - 2⁶ = 442440169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442440433) 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, 3749435 + ... + 3749552.

It is an arithmetic number, because the mean of its divisors is an integer number (112484820).

Almost surely, 2^442440233 is an apocalyptic number.

It is an amenable number.

442440233 is a deficient number, since it is larger than the sum of its proper divisors (7499047).

442440233 is an equidigital number, since it uses as much as digits as its factorization.

442440233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7499046.

The product of its (nonzero) digits is 9216, while the sum is 26.

The square root of 442440233 is about 21034.2633101328. The cubic root of 442440233 is about 761.9939750329.

Adding to 442440233 its reverse (332044244), we get a palindrome (774484477).

The spelling of 442440233 in words is "four hundred forty-two million, four hundred forty thousand, two hundred thirty-three".