218332308823 has 2 divisors, whose sum is σ = 218332308824. Its totient is φ = 218332308822.

The previous prime is 218332308773. The next prime is 218332308833. The reversal of 218332308823 is 328803233812.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-218332308823 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 218332308823.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (218332308833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109166154411 + 109166154412.

It is an arithmetic number, because the mean of its divisors is an integer number (109166154412).

Almost surely, 2^218332308823 is an apocalyptic number.

218332308823 is a deficient number, since it is larger than the sum of its proper divisors (1).

218332308823 is an equidigital number, since it uses as much as digits as its factorization.

218332308823 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 331776, while the sum is 43.

The spelling of 218332308823 in words is "two hundred eighteen billion, three hundred thirty-two million, three hundred eight thousand, eight hundred twenty-three".