442404231 has 4 divisors (see below), whose sum is σ = 589872312. Its totient is φ = 294936152.

The previous prime is 442404229. The next prime is 442404247. The reversal of 442404231 is 132404244.

It is a happy number.

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 442404231 - 2¹ = 442404229 is a prime.

It is a super-2 number, since 2×442404231² = 391443007213402722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442404631) 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, 73734036 + ... + 73734041.

It is an arithmetic number, because the mean of its divisors is an integer number (147468078).

Almost surely, 2^442404231 is an apocalyptic number.

442404231 is a deficient number, since it is larger than the sum of its proper divisors (147468081).

442404231 is a wasteful number, since it uses less digits than its factorization.

442404231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147468080.

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 442404231 is about 21033.4074985486. The cubic root of 442404231 is about 761.9733062893.

Adding to 442404231 its reverse (132404244), we get a palindrome (574808475).

The spelling of 442404231 in words is "four hundred forty-two million, four hundred four thousand, two hundred thirty-one".