218332801 has 4 divisors (see below), whose sum is σ = 223410352. Its totient is φ = 213255252.

The previous prime is 218332787. The next prime is 218332817. The reversal of 218332801 is 108233812.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 218332801 - 2⁵ = 218332769 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 218332801.

It is not an unprimeable number, because it can be changed into a prime (218332861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2538711 + ... + 2538796.

It is an arithmetic number, because the mean of its divisors is an integer number (55852588).

Almost surely, 2^218332801 is an apocalyptic number.

It is an amenable number.

218332801 is a deficient number, since it is larger than the sum of its proper divisors (5077551).

218332801 is an equidigital number, since it uses as much as digits as its factorization.

218332801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5077550.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 218332801 is about 14776.0888262084. The cubic root of 218332801 is about 602.1522712420.

The spelling of 218332801 in words is "two hundred eighteen million, three hundred thirty-two thousand, eight hundred one".