231131310131 has 8 divisors (see below), whose sum is σ = 245134277664. Its totient is φ = 217457824320.

The previous prime is 231131310127. The next prime is 231131310139. The reversal of 231131310131 is 131013131132.

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

It is a cyclic number.

It is not a de Polignac number, because 231131310131 - 2² = 231131310127 is a prime.

It is a super-2 number, since 2×231131310131² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231131310139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82368986 + ... + 82371791.

It is an arithmetic number, because the mean of its divisors is an integer number (30641784708).

Almost surely, 2^231131310131 is an apocalyptic number.

231131310131 is a deficient number, since it is larger than the sum of its proper divisors (14002967533).

231131310131 is a wasteful number, since it uses less digits than its factorization.

231131310131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164740861.

The product of its (nonzero) digits is 162, while the sum is 20.

Adding to 231131310131 its reverse (131013131132), we get a palindrome (362144441263).

The spelling of 231131310131 in words is "two hundred thirty-one billion, one hundred thirty-one million, three hundred ten thousand, one hundred thirty-one".