442144331 has 2 divisors, whose sum is σ = 442144332. Its totient is φ = 442144330.

The previous prime is 442144327. The next prime is 442144343. The reversal of 442144331 is 133441244.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 442144331 - 2² = 442144327 is a prime.

It is a super-2 number, since 2×442144331² = 390983218870875122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 442144331.

It is not a weakly prime, because it can be changed into another prime (442134331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221072165 + 221072166.

It is an arithmetic number, because the mean of its divisors is an integer number (221072166).

Almost surely, 2^442144331 is an apocalyptic number.

442144331 is a deficient number, since it is larger than the sum of its proper divisors (1).

442144331 is an equidigital number, since it uses as much as digits as its factorization.

442144331 is an odious number, because the sum of its binary digits is odd.

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

The square root of 442144331 is about 21027.2283242466. The cubic root of 442144331 is about 761.8240644561.

Adding to 442144331 its reverse (133441244), we get a palindrome (575585575).

The spelling of 442144331 in words is "four hundred forty-two million, one hundred forty-four thousand, three hundred thirty-one".