231123165 has 32 divisors (see below), whose sum is σ = 455137536. Its totient is φ = 97528320.

The previous prime is 231123149. The next prime is 231123181. The reversal of 231123165 is 561321132.

It is an interprime number because it is at equal distance from previous prime (231123149) and next prime (231123181).

It is not a de Polignac number, because 231123165 - 2⁴ = 231123149 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 83296 + ... + 86025.

It is an arithmetic number, because the mean of its divisors is an integer number (14223048).

Almost surely, 2^231123165 is an apocalyptic number.

It is an amenable number.

231123165 is a deficient number, since it is larger than the sum of its proper divisors (224014371).

231123165 is a wasteful number, since it uses less digits than its factorization.

231123165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169349.

The product of its digits is 1080, while the sum is 24.

The square root of 231123165 is about 15202.7354446494. The cubic root of 231123165 is about 613.6882743564.

Adding to 231123165 its reverse (561321132), we get a palindrome (792444297).

The spelling of 231123165 in words is "two hundred thirty-one million, one hundred twenty-three thousand, one hundred sixty-five".