231413231 has 24 divisors (see below), whose sum is σ = 286171920. Its totient is φ = 185939712.

The previous prime is 231413227. The next prime is 231413249. The reversal of 231413231 is 132314132.

It is not a de Polignac number, because 231413231 - 2² = 231413227 is a prime.

It is a super-2 number, since 2×231413231² = 107104166963718722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231413201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 315341 + ... + 316073.

It is an arithmetic number, because the mean of its divisors is an integer number (11923830).

Almost surely, 2^231413231 is an apocalyptic number.

231413231 is a deficient number, since it is larger than the sum of its proper divisors (54758689).

231413231 is a wasteful number, since it uses less digits than its factorization.

231413231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1143 (or 1136 counting only the distinct ones).

The product of its digits is 432, while the sum is 20.

The square root of 231413231 is about 15212.2723812059. The cubic root of 231413231 is about 613.9448989800.

Adding to 231413231 its reverse (132314132), we get a palindrome (363727363).

Subtracting from 231413231 its reverse (132314132), we obtain a palindrome (99099099).

The spelling of 231413231 in words is "two hundred thirty-one million, four hundred thirteen thousand, two hundred thirty-one".