42431443 has 4 divisors (see below), whose sum is σ = 43150680. Its totient is φ = 41712208.

The previous prime is 42431407. The next prime is 42431447. The reversal of 42431443 is 34413424.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42431443 - 2²¹ = 40334291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42431447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359530 + ... + 359647.

It is an arithmetic number, because the mean of its divisors is an integer number (10787670).

Almost surely, 2^42431443 is an apocalyptic number.

42431443 is a deficient number, since it is larger than the sum of its proper divisors (719237).

42431443 is an equidigital number, since it uses as much as digits as its factorization.

42431443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719236.

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

The square root of 42431443 is about 6513.9422011559. The cubic root of 42431443 is about 348.7888559543.

Adding to 42431443 its reverse (34413424), we get a palindrome (76844867).

The spelling of 42431443 in words is "forty-two million, four hundred thirty-one thousand, four hundred forty-three".