133155 has 24 divisors (see below), whose sum is σ = 252720. Its totient is φ = 64320.

The previous prime is 133153. The next prime is 133157. The reversal of 133155 is 551331.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (133153) and next prime (133157).

It is not a de Polignac number, because 133155 - 2¹ = 133153 is a prime.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (133153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 361 + ... + 629.

It is an arithmetic number, because the mean of its divisors is an integer number (10530).

2¹³³¹⁵⁵ is an apocalyptic number.

133155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

133155 is a deficient number, since it is larger than the sum of its proper divisors (119565).

133155 is a wasteful number, since it uses less digits than its factorization.

133155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291 (or 288 counting only the distinct ones).

The product of its digits is 225, while the sum is 18.

The square root of 133155 is about 364.9040969899. The cubic root of 133155 is about 51.0645089116.

Adding to 133155 its reverse (551331), we get a palindrome (684486).

The spelling of 133155 in words is "one hundred thirty-three thousand, one hundred fifty-five".