133018 has 4 divisors (see below), whose sum is σ = 199530. Its totient is φ = 66508.

The previous prime is 133013. The next prime is 133033. The reversal of 133018 is 810331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 810331 = 19 ⋅42649.

It can be written as a sum of positive squares in only one way, i.e., 91809 + 41209 = 303^2 + 203^2 .

It is a junction number, because it is equal to n+sod(n) for n = 132992 and 133010.

It is not an unprimeable number, because it can be changed into a prime (133013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33253 + ... + 33256.

2¹³³⁰¹⁸ is an apocalyptic number.

133018 is a deficient number, since it is larger than the sum of its proper divisors (66512).

133018 is an equidigital number, since it uses as much as digits as its factorization.

133018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66511.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 133018 is about 364.7163281237. The cubic root of 133018 is about 51.0469898840.

Adding to 133018 its reverse (810331), we get a palindrome (943349).

The spelling of 133018 in words is "one hundred thirty-three thousand, eighteen".