442344431 has 2 divisors, whose sum is σ = 442344432. Its totient is φ = 442344430.

The previous prime is 442344421. The next prime is 442344439. The reversal of 442344431 is 134443244.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442344431 is a prime.

It is a super-2 number, since 2×442344431² = 391337191273427522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 442344394 and 442344403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442344439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221172215 + 221172216.

It is an arithmetic number, because the mean of its divisors is an integer number (221172216).

Almost surely, 2^442344431 is an apocalyptic number.

442344431 is a deficient number, since it is larger than the sum of its proper divisors (1).

442344431 is an equidigital number, since it uses as much as digits as its factorization.

442344431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18432, while the sum is 29.

The square root of 442344431 is about 21031.9859024297. The cubic root of 442344431 is about 761.9389726386.

Adding to 442344431 its reverse (134443244), we get a palindrome (576787675).

The spelling of 442344431 in words is "four hundred forty-two million, three hundred forty-four thousand, four hundred thirty-one".