42443331 has 16 divisors (see below), whose sum is σ = 65319168. Its totient is φ = 24012000.

The previous prime is 42443311. The next prime is 42443341. The reversal of 42443331 is 13334424.

It is not a de Polignac number, because 42443331 - 2⁶ = 42443267 is a prime.

It is a super-2 number, since 2×42443331² = 3602872692751122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42443311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7885 + ... + 12126.

It is an arithmetic number, because the mean of its divisors is an integer number (4082448).

Almost surely, 2^42443331 is an apocalyptic number.

42443331 is a deficient number, since it is larger than the sum of its proper divisors (22875837).

42443331 is a wasteful number, since it uses less digits than its factorization.

42443331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20122.

The product of its digits is 3456, while the sum is 24.

The square root of 42443331 is about 6514.8546415097. The cubic root of 42443331 is about 348.8214262564.

Adding to 42443331 its reverse (13334424), we get a palindrome (55777755).

The spelling of 42443331 in words is "forty-two million, four hundred forty-three thousand, three hundred thirty-one".