231211323 has 48 divisors (see below), whose sum is σ = 403603200. Its totient is φ = 124597440.

The previous prime is 231211291. The next prime is 231211327. The reversal of 231211323 is 323112132.

231211323 is nontrivially palindromic in base 2.

It is not a de Polignac number, because 231211323 - 2⁵ = 231211291 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231211296 and 231211305.

It is not an unprimeable number, because it can be changed into a prime (231211327) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 501313 + ... + 501773.

It is an arithmetic number, because the mean of its divisors is an integer number (8408400).

Almost surely, 2^231211323 is an apocalyptic number.

231211323 is a deficient number, since it is larger than the sum of its proper divisors (172391877).

231211323 is a wasteful number, since it uses less digits than its factorization.

231211323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912 (or 909 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 231211323 is about 15205.6345806415. The cubic root of 231211323 is about 613.7662914224.

Adding to 231211323 its reverse (323112132), we get a palindrome (554323455).

It can be divided in two parts, 23 and 1211323, that added together give a triangular number (1211346 = T₁₅₅₆).

The spelling of 231211323 in words is "two hundred thirty-one million, two hundred eleven thousand, three hundred twenty-three".