218133142 has 8 divisors (see below), whose sum is σ = 327267000. Its totient is φ = 109044144.

The previous prime is 218133121. The next prime is 218133187. The reversal of 218133142 is 241331812.

It is a happy number.

218133142 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6609 + ... + 21907.

It is an arithmetic number, because the mean of its divisors is an integer number (40908375).

Almost surely, 2^218133142 is an apocalyptic number.

218133142 is a deficient number, since it is larger than the sum of its proper divisors (109133858).

218133142 is a wasteful number, since it uses less digits than its factorization.

218133142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22430.

The product of its digits is 1152, while the sum is 25.

The square root of 218133142 is about 14769.3311290661. The cubic root of 218133142 is about 601.9686650136.

Adding to 218133142 its reverse (241331812), we get a palindrome (459464954).

The spelling of 218133142 in words is "two hundred eighteen million, one hundred thirty-three thousand, one hundred forty-two".