218000133 has 16 divisors (see below), whose sum is σ = 347807040. Its totient is φ = 134153712.

The previous prime is 218000099. The next prime is 218000143. The reversal of 218000133 is 331000812.

It is not a de Polignac number, because 218000133 - 2⁸ = 217999877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218000143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 310191 + ... + 310892.

It is an arithmetic number, because the mean of its divisors is an integer number (21737940).

Almost surely, 2^218000133 is an apocalyptic number.

It is an amenable number.

218000133 is a deficient number, since it is larger than the sum of its proper divisors (129806907).

218000133 is a wasteful number, since it uses less digits than its factorization.

218000133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621105 (or 621099 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 218000133 is about 14764.8275641810. The cubic root of 218000133 is about 601.8462878744.

Adding to 218000133 its reverse (331000812), we get a palindrome (549000945).

The spelling of 218000133 in words is "two hundred eighteen million, one hundred thirty-three", and thus it is an aban number.