231008135 has 16 divisors (see below), whose sum is σ = 281797920. Its totient is φ = 181762560.

The previous prime is 231008117. The next prime is 231008147. The reversal of 231008135 is 531800132.

It is not a de Polignac number, because 231008135 - 2¹⁴ = 230991751 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231008135.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 178571 + ... + 179859.

It is an arithmetic number, because the mean of its divisors is an integer number (17612370).

Almost surely, 2^231008135 is an apocalyptic number.

231008135 is a deficient number, since it is larger than the sum of its proper divisors (50789785).

231008135 is a wasteful number, since it uses less digits than its factorization.

231008135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1858.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 231008135 is about 15198.9517730665. The cubic root of 231008135 is about 613.5864465759.

Adding to 231008135 its reverse (531800132), we get a palindrome (762808267).

The spelling of 231008135 in words is "two hundred thirty-one million, eight thousand, one hundred thirty-five".