133231135 has 32 divisors (see below), whose sum is σ = 175426560. Its totient is φ = 96789888.

The previous prime is 133231129. The next prime is 133231139. The reversal of 133231135 is 531132331.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 133231135 - 2⁵ = 133231103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133231139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 236364 + ... + 236926.

It is an arithmetic number, because the mean of its divisors is an integer number (5482080).

Almost surely, 2^133231135 is an apocalyptic number.

133231135 is a deficient number, since it is larger than the sum of its proper divisors (42195425).

133231135 is a wasteful number, since it uses less digits than its factorization.

133231135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687.

The product of its digits is 810, while the sum is 22.

The square root of 133231135 is about 11542.5792178352. The cubic root of 133231135 is about 510.7423956547.

Adding to 133231135 its reverse (531132331), we get a palindrome (664363466).

The spelling of 133231135 in words is "one hundred thirty-three million, two hundred thirty-one thousand, one hundred thirty-five".