42442313 has 4 divisors (see below), whose sum is σ = 42494340. Its totient is φ = 42390288.

The previous prime is 42442307. The next prime is 42442349. The reversal of 42442313 is 31324424.

42442313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 35904064 + 6538249 = 5992^2 + 2557^2 .

It is a cyclic number.

It is not a de Polignac number, because 42442313 - 2¹² = 42438217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42442373) 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 3 ways as a sum of consecutive naturals, for example, 24770 + ... + 26427.

It is an arithmetic number, because the mean of its divisors is an integer number (10623585).

Almost surely, 2^42442313 is an apocalyptic number.

It is an amenable number.

42442313 is a deficient number, since it is larger than the sum of its proper divisors (52027).

42442313 is an equidigital number, since it uses as much as digits as its factorization.

42442313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52026.

The product of its digits is 2304, while the sum is 23.

The square root of 42442313 is about 6514.7765118997. The cubic root of 42442313 is about 348.8186374158.

Adding to 42442313 its reverse (31324424), we get a palindrome (73766737).

The spelling of 42442313 in words is "forty-two million, four hundred forty-two thousand, three hundred thirteen".