442444231 has 2 divisors, whose sum is σ = 442444232. Its totient is φ = 442444230.

The previous prime is 442444207. The next prime is 442444253. The reversal of 442444231 is 132444244.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 442444231 - 2⁹ = 442443719 is a prime.

It is a super-2 number, since 2×442444231² = 391513795090362722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 442444231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442444831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221222115 + 221222116.

It is an arithmetic number, because the mean of its divisors is an integer number (221222116).

Almost surely, 2^442444231 is an apocalyptic number.

442444231 is a deficient number, since it is larger than the sum of its proper divisors (1).

442444231 is an equidigital number, since it uses as much as digits as its factorization.

442444231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12288, while the sum is 28.

The square root of 442444231 is about 21034.3583453359. The cubic root of 442444231 is about 761.9962702150.

Adding to 442444231 its reverse (132444244), we get a palindrome (574888475).

The spelling of 442444231 in words is "four hundred forty-two million, four hundred forty-four thousand, two hundred thirty-one".