218213203 has 4 divisors (see below), whose sum is σ = 234998848. Its totient is φ = 201427560.

The previous prime is 218213183. The next prime is 218213231. The reversal of 218213203 is 302312812.

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 218213203 - 2⁹ = 218212691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (218213263) 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, 8392803 + ... + 8392828.

It is an arithmetic number, because the mean of its divisors is an integer number (58749712).

Almost surely, 2^218213203 is an apocalyptic number.

218213203 is a deficient number, since it is larger than the sum of its proper divisors (16785645).

218213203 is a wasteful number, since it uses less digits than its factorization.

218213203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16785644.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 218213203 is about 14772.0412604352. The cubic root of 218213203 is about 602.0423024839.

The spelling of 218213203 in words is "two hundred eighteen million, two hundred thirteen thousand, two hundred three".