211404323343 has 4 divisors (see below), whose sum is σ = 281872431128. Its totient is φ = 140936215560.

The previous prime is 211404323341. The next prime is 211404323399. The reversal of 211404323343 is 343323404112.

It is a happy number.

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

It is not a de Polignac number, because 211404323343 - 2¹ = 211404323341 is a prime.

It is a super-2 number, since 2×211404323343² (a number of 23 digits) contains 22 as substring.

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 211404323343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211404323341) 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, 35234053888 + ... + 35234053893.

It is an arithmetic number, because the mean of its divisors is an integer number (70468107782).

Almost surely, 2^211404323343 is an apocalyptic number.

211404323343 is a deficient number, since it is larger than the sum of its proper divisors (70468107785).

211404323343 is an equidigital number, since it uses as much as digits as its factorization.

211404323343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70468107784.

The product of its (nonzero) digits is 20736, while the sum is 30.

Adding to 211404323343 its reverse (343323404112), we get a palindrome (554727727455).

The spelling of 211404323343 in words is "two hundred eleven billion, four hundred four million, three hundred twenty-three thousand, three hundred forty-three".