231133135 has 16 divisors (see below), whose sum is σ = 279864000. Its totient is φ = 183246336.

The previous prime is 231133109. The next prime is 231133153. The reversal of 231133135 is 531331132.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231133135 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 385566 + ... + 386164.

It is an arithmetic number, because the mean of its divisors is an integer number (17491500).

Almost surely, 2^231133135 is an apocalyptic number.

231133135 is a deficient number, since it is larger than the sum of its proper divisors (48730865).

231133135 is a wasteful number, since it uses less digits than its factorization.

231133135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1170.

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

The square root of 231133135 is about 15203.0633426293. The cubic root of 231133135 is about 613.6970984887.

Adding to 231133135 its reverse (531331132), we get a palindrome (762464267).

The spelling of 231133135 in words is "two hundred thirty-one million, one hundred thirty-three thousand, one hundred thirty-five".