42543425213 has 4 divisors (see below), whose sum is σ = 42544338108. Its totient is φ = 42542512320.

The previous prime is 42543425207. The next prime is 42543425273. The reversal of 42543425213 is 31252434524.

It is a happy number.

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 14104650169 + 28438775044 = 118763^2 + 168638^2 .

It is a cyclic number.

It is not a de Polignac number, because 42543425213 - 2⁶ = 42543425149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42543425273) 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, 382556 + ... + 481077.

It is an arithmetic number, because the mean of its divisors is an integer number (10636084527).

Almost surely, 2^42543425213 is an apocalyptic number.

It is an amenable number.

42543425213 is a deficient number, since it is larger than the sum of its proper divisors (912895).

42543425213 is an equidigital number, since it uses as much as digits as its factorization.

42543425213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 912894.

The product of its digits is 115200, while the sum is 35.

Adding to 42543425213 its reverse (31252434524), we get a palindrome (73795859737).

The spelling of 42543425213 in words is "forty-two billion, five hundred forty-three million, four hundred twenty-five thousand, two hundred thirteen".