218324949443 has 4 divisors (see below), whose sum is σ = 218331053880. Its totient is φ = 218318845008.

The previous prime is 218324949431. The next prime is 218324949473. The reversal of 218324949443 is 344949423812.

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 218324949443 - 2⁸ = 218324949187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (218324949413) 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, 2998253 + ... + 3070206.

It is an arithmetic number, because the mean of its divisors is an integer number (54582763470).

Almost surely, 2^218324949443 is an apocalyptic number.

218324949443 is a deficient number, since it is larger than the sum of its proper divisors (6104437).

218324949443 is an equidigital number, since it uses as much as digits as its factorization.

218324949443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6104436.

The product of its digits is 5971968, while the sum is 53.

The spelling of 218324949443 in words is "two hundred eighteen billion, three hundred twenty-four million, nine hundred forty-nine thousand, four hundred forty-three".