211404342323 has 4 divisors (see below), whose sum is σ = 211405262208. Its totient is φ = 211403422440.

The previous prime is 211404342269. The next prime is 211404342349. The reversal of 211404342323 is 323243404112.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 211404342323 - 2³⁰ = 210330600499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211404312323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212078 + ... + 683948.

It is an arithmetic number, because the mean of its divisors is an integer number (52851315552).

Almost surely, 2^211404342323 is an apocalyptic number.

211404342323 is a deficient number, since it is larger than the sum of its proper divisors (919885).

211404342323 is an equidigital number, since it uses as much as digits as its factorization.

211404342323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919884.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 211404342323 its reverse (323243404112), we get a palindrome (534647746435).

The spelling of 211404342323 in words is "two hundred eleven billion, four hundred four million, three hundred forty-two thousand, three hundred twenty-three".