213203240443 has 4 divisors (see below), whose sum is σ = 215195794200. Its totient is φ = 211210686688.

The previous prime is 213203240441. The next prime is 213203240449. The reversal of 213203240443 is 344042302312.

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 213203240443 - 2¹ = 213203240441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213203240441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 996276718 + ... + 996276931.

It is an arithmetic number, because the mean of its divisors is an integer number (53798948550).

Almost surely, 2^213203240443 is an apocalyptic number.

213203240443 is a deficient number, since it is larger than the sum of its proper divisors (1992553757).

213203240443 is a wasteful number, since it uses less digits than its factorization.

213203240443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1992553756.

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 213203240443 its reverse (344042302312), we get a palindrome (557245542755).

The spelling of 213203240443 in words is "two hundred thirteen billion, two hundred three million, two hundred forty thousand, four hundred forty-three".