42444331 has 2 divisors, whose sum is σ = 42444332. Its totient is φ = 42444330.

The previous prime is 42444329. The next prime is 42444377. The reversal of 42444331 is 13344424.

42444331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42444331 - 2¹ = 42444329 is a prime.

It is a super-2 number, since 2×42444331² = 3603042468075122, which contains 22 as substring.

Together with 42444329, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 42444296 and 42444305.

It is not a weakly prime, because it can be changed into another prime (42444931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21222165 + 21222166.

It is an arithmetic number, because the mean of its divisors is an integer number (21222166).

Almost surely, 2^42444331 is an apocalyptic number.

42444331 is a deficient number, since it is larger than the sum of its proper divisors (1).

42444331 is an equidigital number, since it uses as much as digits as its factorization.

42444331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4608, while the sum is 25.

The square root of 42444331 is about 6514.9313887408. The cubic root of 42444331 is about 348.8241657420.

Adding to 42444331 its reverse (13344424), we get a palindrome (55788755).

The spelling of 42444331 in words is "forty-two million, four hundred forty-four thousand, three hundred thirty-one".