211205423343 has 4 divisors (see below), whose sum is σ = 281607231128. Its totient is φ = 140803615560.

The previous prime is 211205423287. The next prime is 211205423353. The reversal of 211205423343 is 343324502112.

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

It is not a de Polignac number, because 211205423343 - 2⁶ = 211205423279 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 211205423343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211205423353) 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, 35200903888 + ... + 35200903893.

It is an arithmetic number, because the mean of its divisors is an integer number (70401807782).

Almost surely, 2^211205423343 is an apocalyptic number.

211205423343 is a deficient number, since it is larger than the sum of its proper divisors (70401807785).

211205423343 is an equidigital number, since it uses as much as digits as its factorization.

211205423343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70401807784.

The product of its (nonzero) digits is 17280, while the sum is 30.

Adding to 211205423343 its reverse (343324502112), we get a palindrome (554529925455).

The spelling of 211205423343 in words is "two hundred eleven billion, two hundred five million, four hundred twenty-three thousand, three hundred forty-three".