231334131 has 16 divisors (see below), whose sum is σ = 364665600. Its totient is φ = 127632288.

The previous prime is 231334099. The next prime is 231334133. The reversal of 231334131 is 131433132.

It is not a de Polignac number, because 231334131 - 2⁵ = 231334099 is a prime.

It is a super-2 number, since 2×231334131² = 107030960331050322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 231334098 and 231334107.

It is not an unprimeable number, because it can be changed into a prime (231334133) 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, 189321 + ... + 190538.

It is an arithmetic number, because the mean of its divisors is an integer number (22791600).

Almost surely, 2^231334131 is an apocalyptic number.

231334131 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

231334131 is a deficient number, since it is larger than the sum of its proper divisors (133331469).

231334131 is a wasteful number, since it uses less digits than its factorization.

231334131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379898.

The product of its digits is 648, while the sum is 21.

The square root of 231334131 is about 15209.6722844380. The cubic root of 231334131 is about 613.8749396040.

Adding to 231334131 its reverse (131433132), we get a palindrome (362767263).

Subtracting from 231334131 its reverse (131433132), we obtain a palindrome (99900999).

The spelling of 231334131 in words is "two hundred thirty-one million, three hundred thirty-four thousand, one hundred thirty-one".