442330331 has 4 divisors (see below), whose sum is σ = 444622392. Its totient is φ = 440038272.

The previous prime is 442330321. The next prime is 442330333. The reversal of 442330331 is 133033244.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442330331 is a prime.

It is a super-2 number, since 2×442330331² = 391312243445139122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 442330297 and 442330306.

It is not an unprimeable number, because it can be changed into a prime (442330333) 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, 1145741 + ... + 1146126.

It is an arithmetic number, because the mean of its divisors is an integer number (111155598).

Almost surely, 2^442330331 is an apocalyptic number.

442330331 is a deficient number, since it is larger than the sum of its proper divisors (2292061).

442330331 is a wasteful number, since it uses less digits than its factorization.

442330331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2292060.

The product of its (nonzero) digits is 2592, while the sum is 23.

The square root of 442330331 is about 21031.6506960343. The cubic root of 442330331 is about 761.9308767953.

Adding to 442330331 its reverse (133033244), we get a palindrome (575363575).

The spelling of 442330331 in words is "four hundred forty-two million, three hundred thirty thousand, three hundred thirty-one".