231135255 has 32 divisors (see below), whose sum is σ = 442518720. Its totient is φ = 113788800.

The previous prime is 231135253. The next prime is 231135269. The reversal of 231135255 is 552531132.

It is a happy number.

231135255 is a `hidden beast` number, since 23 + 113 + 525 + 5 = 666.

It is not a de Polignac number, because 231135255 - 2¹ = 231135253 is a prime.

It is a super-2 number, since 2×231135255² = 106847012207830050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231135253) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64096 + ... + 67605.

It is an arithmetic number, because the mean of its divisors is an integer number (13828710).

Almost surely, 2^231135255 is an apocalyptic number.

231135255 is a deficient number, since it is larger than the sum of its proper divisors (211383465).

231135255 is a wasteful number, since it uses less digits than its factorization.

231135255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131728 (or 131722 counting only the distinct ones).

The product of its digits is 4500, while the sum is 27.

The square root of 231135255 is about 15203.1330652599. The cubic root of 231135255 is about 613.6989748011.

Adding to 231135255 its reverse (552531132), we get a palindrome (783666387).

The spelling of 231135255 in words is "two hundred thirty-one million, one hundred thirty-five thousand, two hundred fifty-five".