211445004223 has 4 divisors (see below), whose sum is σ = 211540553208. Its totient is φ = 211349455240.

The previous prime is 211445004217. The next prime is 211445004233. The reversal of 211445004223 is 322400544112.

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 211445004223 - 2¹⁷ = 211444873151 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211445004191 and 211445004200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211445004203) 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, 47771173 + ... + 47775598.

It is an arithmetic number, because the mean of its divisors is an integer number (52885138302).

Almost surely, 2^211445004223 is an apocalyptic number.

211445004223 is a deficient number, since it is larger than the sum of its proper divisors (95548985).

211445004223 is an equidigital number, since it uses as much as digits as its factorization.

211445004223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95548984.

The product of its (nonzero) digits is 7680, while the sum is 28.

Adding to 211445004223 its reverse (322400544112), we get a palindrome (533845548335).

The spelling of 211445004223 in words is "two hundred eleven billion, four hundred forty-five million, four thousand, two hundred twenty-three".