211444223143 has 4 divisors (see below), whose sum is σ = 223882118640. Its totient is φ = 199006327648.

The previous prime is 211444223119. The next prime is 211444223147. The reversal of 211444223143 is 341322444112.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211444223143 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 (211444223147) 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, 6218947723 + ... + 6218947756.

It is an arithmetic number, because the mean of its divisors is an integer number (55970529660).

Almost surely, 2^211444223143 is an apocalyptic number.

211444223143 is a deficient number, since it is larger than the sum of its proper divisors (12437895497).

211444223143 is a wasteful number, since it uses less digits than its factorization.

211444223143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12437895496.

The product of its digits is 18432, while the sum is 31.

Adding to 211444223143 its reverse (341322444112), we get a palindrome (552766667255).

The spelling of 211444223143 in words is "two hundred eleven billion, four hundred forty-four million, two hundred twenty-three thousand, one hundred forty-three".