211224304243 has 4 divisors (see below), whose sum is σ = 215209668528. Its totient is φ = 207238939960.

The previous prime is 211224304211. The next prime is 211224304279. The reversal of 211224304243 is 342403422112.

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 211224304243 - 2⁵ = 211224304211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211224304283) 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, 1992682063 + ... + 1992682168.

It is an arithmetic number, because the mean of its divisors is an integer number (53802417132).

Almost surely, 2^211224304243 is an apocalyptic number.

211224304243 is a deficient number, since it is larger than the sum of its proper divisors (3985364285).

211224304243 is an equidigital number, since it uses as much as digits as its factorization.

211224304243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3985364284.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 211224304243 its reverse (342403422112), we get a palindrome (553627726355).

The spelling of 211224304243 in words is "two hundred eleven billion, two hundred twenty-four million, three hundred four thousand, two hundred forty-three".