442441331 has 4 divisors (see below), whose sum is σ = 456713664. Its totient is φ = 428169000.

The previous prime is 442441327. The next prime is 442441453. The reversal of 442441331 is 133144244.

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

It is a cyclic number.

It is not a de Polignac number, because 442441331 - 2² = 442441327 is a prime.

It is a super-2 number, since 2×442441331² = 391508662754103122, which contains 22 as substring.

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 442441331.

It is not an unprimeable number, because it can be changed into a prime (442441231) 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, 7136120 + ... + 7136181.

It is an arithmetic number, because the mean of its divisors is an integer number (114178416).

Almost surely, 2^442441331 is an apocalyptic number.

442441331 is a deficient number, since it is larger than the sum of its proper divisors (14272333).

442441331 is a wasteful number, since it uses less digits than its factorization.

442441331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14272332.

The product of its digits is 4608, while the sum is 26.

The square root of 442441331 is about 21034.2894103889. The cubic root of 442441331 is about 761.9946053769.

Adding to 442441331 its reverse (133144244), we get a palindrome (575585575).

The spelling of 442441331 in words is "four hundred forty-two million, four hundred forty-one thousand, three hundred thirty-one".