42443831 has 8 divisors (see below), whose sum is σ = 43379280. Its totient is φ = 41513472.

The previous prime is 42443801. The next prime is 42443857. The reversal of 42443831 is 13834424.

42443831 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42443831 - 2⁶ = 42443767 is a prime.

It is a super-2 number, since 2×42443831² = 3602957579913122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42443794 and 42443803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42443801) 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 in 7 ways as a sum of consecutive naturals, for example, 19031 + ... + 21143.

It is an arithmetic number, because the mean of its divisors is an integer number (5422410).

Almost surely, 2^42443831 is an apocalyptic number.

42443831 is a deficient number, since it is larger than the sum of its proper divisors (935449).

42443831 is a wasteful number, since it uses less digits than its factorization.

42443831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2545.

The product of its digits is 9216, while the sum is 29.

The square root of 42443831 is about 6514.8930152382. The cubic root of 42443831 is about 348.8227960045.

The spelling of 42443831 in words is "forty-two million, four hundred forty-three thousand, eight hundred thirty-one".