213044340243 has 16 divisors (see below), whose sum is σ = 324645451520. Its totient is φ = 121737201696.

The previous prime is 213044340199. The next prime is 213044340293. The reversal of 213044340243 is 342043440312.

It is a happy number.

213044340243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 213044340243 - 2³⁴ = 195864471059 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 213044340243.

It is not an unprimeable number, because it can be changed into a prime (213044340293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1943913 + ... + 2050581.

It is an arithmetic number, because the mean of its divisors is an integer number (20290340720).

Almost surely, 2^213044340243 is an apocalyptic number.

213044340243 is a deficient number, since it is larger than the sum of its proper divisors (111601111277).

213044340243 is a wasteful number, since it uses less digits than its factorization.

213044340243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201786.

The product of its (nonzero) digits is 27648, while the sum is 30.

Adding to 213044340243 its reverse (342043440312), we get a palindrome (555087780555).

The spelling of 213044340243 in words is "two hundred thirteen billion, forty-four million, three hundred forty thousand, two hundred forty-three".