133318 has 8 divisors (see below), whose sum is σ = 201600. Its totient is φ = 66120.

The previous prime is 133303. The next prime is 133319. The reversal of 133318 is 813331.

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

It is a junction number, because it is equal to n+sod(n) for n = 133295 and 133304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208 + ... + 556.

It is an arithmetic number, because the mean of its divisors is an integer number (25200).

2¹³³³¹⁸ is an apocalyptic number.

133318 is a deficient number, since it is larger than the sum of its proper divisors (68282).

133318 is a wasteful number, since it uses less digits than its factorization.

133318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542.

The product of its digits is 216, while the sum is 19.

The square root of 133318 is about 365.1273750351. The cubic root of 133318 is about 51.0853370715.

Adding to 133318 its reverse (813331), we get a palindrome (946649).

It can be divided in two parts, 13 and 3318, that multiplied together give a palindrome (43134).

The spelling of 133318 in words is "one hundred thirty-three thousand, three hundred eighteen".