231040131 has 8 divisors (see below), whose sum is σ = 352061184. Its totient is φ = 132022920.

The previous prime is 231040097. The next prime is 231040151. The reversal of 231040131 is 131040132.

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

It is not a de Polignac number, because 231040131 - 2⁶ = 231040067 is a prime.

It is a super-2 number, since 2×231040131² = 106759084264994322, 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 231040131.

It is not an unprimeable number, because it can be changed into a prime (231040151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5500935 + ... + 5500976.

It is an arithmetic number, because the mean of its divisors is an integer number (44007648).

Almost surely, 2^231040131 is an apocalyptic number.

231040131 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

231040131 is a deficient number, since it is larger than the sum of its proper divisors (121021053).

231040131 is a wasteful number, since it uses less digits than its factorization.

231040131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11001921.

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

The square root of 231040131 is about 15200.0043092099. The cubic root of 231040131 is about 613.6147737250.

Adding to 231040131 its reverse (131040132), we get a palindrome (362080263).

Subtracting from 231040131 its reverse (131040132), we obtain a palindrome (99999999).

The spelling of 231040131 in words is "two hundred thirty-one million, forty thousand, one hundred thirty-one".