218045133 has 6 divisors (see below), whose sum is σ = 314954094. Its totient is φ = 145363416.

The previous prime is 218045119. The next prime is 218045137. The reversal of 218045133 is 331540812.

It is a happy number.

218045133 is a `hidden beast` number, since 2 + 180 + 451 + 33 = 666.

It can be written as a sum of positive squares in only one way, i.e., 207273609 + 10771524 = 14397^2 + 3282^2 .

It is not a de Polignac number, because 218045133 - 2⁵ = 218045101 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 218045097 and 218045106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218045137) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12113610 + ... + 12113627.

It is an arithmetic number, because the mean of its divisors is an integer number (52492349).

Almost surely, 2^218045133 is an apocalyptic number.

It is an amenable number.

218045133 is a deficient number, since it is larger than the sum of its proper divisors (96908961).

218045133 is a wasteful number, since it uses less digits than its factorization.

218045133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24227243 (or 24227240 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 218045133 is about 14766.3513773715. The cubic root of 218045133 is about 601.8876964419.

Adding to 218045133 its reverse (331540812), we get a palindrome (549585945).

The spelling of 218045133 in words is "two hundred eighteen million, forty-five thousand, one hundred thirty-three".