231123211 has 16 divisors (see below), whose sum is σ = 270200448. Its totient is φ = 195356800.

The previous prime is 231123209. The next prime is 231123227. The reversal of 231123211 is 112321132.

231123211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 231123211 - 2¹ = 231123209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231123271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8076 + ... + 22966.

It is an arithmetic number, because the mean of its divisors is an integer number (16887528).

Almost surely, 2^231123211 is an apocalyptic number.

231123211 is a deficient number, since it is larger than the sum of its proper divisors (39077237).

231123211 is a wasteful number, since it uses less digits than its factorization.

231123211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15002.

The product of its digits is 72, while the sum is 16.

The square root of 231123211 is about 15202.7369575350. The cubic root of 231123211 is about 613.6883150702.

Adding to 231123211 its reverse (112321132), we get a palindrome (343444343).

The spelling of 231123211 in words is "two hundred thirty-one million, one hundred twenty-three thousand, two hundred eleven".