231120231 has 8 divisors (see below), whose sum is σ = 308356224. Its totient is φ = 153982200.

The previous prime is 231120217. The next prime is 231120247. The reversal of 231120231 is 132021132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 231120231 - 2¹¹ = 231118183 is a prime.

It is a super-2 number, since 2×231120231² = 106833122354986722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 231120231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231125231) 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 7 ways as a sum of consecutive naturals, for example, 18795 + ... + 28556.

It is an arithmetic number, because the mean of its divisors is an integer number (38544528).

Almost surely, 2^231120231 is an apocalyptic number.

231120231 is a deficient number, since it is larger than the sum of its proper divisors (77235993).

231120231 is a wasteful number, since it uses less digits than its factorization.

231120231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48981.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 231120231 is about 15202.6389485510. The cubic root of 231120231 is about 613.6856775173.

Adding to 231120231 its reverse (132021132), we get a palindrome (363141363).

Subtracting from 231120231 its reverse (132021132), we obtain a palindrome (99099099).

The spelling of 231120231 in words is "two hundred thirty-one million, one hundred twenty thousand, two hundred thirty-one".