213205238443 has 4 divisors (see below), whose sum is σ = 217741520160. Its totient is φ = 208668956728.

The previous prime is 213205238429. The next prime is 213205238501. The reversal of 213205238443 is 344832502312.

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 213205238443 - 2²⁹ = 212668367531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213205235443) 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, 2268140788 + ... + 2268140881.

It is an arithmetic number, because the mean of its divisors is an integer number (54435380040).

Almost surely, 2^213205238443 is an apocalyptic number.

213205238443 is a deficient number, since it is larger than the sum of its proper divisors (4536281717).

213205238443 is an equidigital number, since it uses as much as digits as its factorization.

213205238443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4536281716.

The product of its (nonzero) digits is 138240, while the sum is 37.

The spelling of 213205238443 in words is "two hundred thirteen billion, two hundred five million, two hundred thirty-eight thousand, four hundred forty-three".