211404341423 has 4 divisors (see below), whose sum is σ = 230622917928. Its totient is φ = 192185764920.

The previous prime is 211404341411. The next prime is 211404341437. The reversal of 211404341423 is 324143404112.

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 211404341423 - 2¹⁸ = 211404079279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211404341023) 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, 9609288236 + ... + 9609288257.

It is an arithmetic number, because the mean of its divisors is an integer number (57655729482).

Almost surely, 2^211404341423 is an apocalyptic number.

211404341423 is a deficient number, since it is larger than the sum of its proper divisors (19218576505).

211404341423 is a wasteful number, since it uses less digits than its factorization.

211404341423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19218576504.

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 211404341423 its reverse (324143404112), we get a palindrome (535547745535).

The spelling of 211404341423 in words is "two hundred eleven billion, four hundred four million, three hundred forty-one thousand, four hundred twenty-three".