231323330131 has 8 divisors (see below), whose sum is σ = 235255350960. Its totient is φ = 227391685632.

The previous prime is 231323330123. The next prime is 231323330137. The reversal of 231323330131 is 131033323132.

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 231323330131 - 2³ = 231323330123 is a prime.

It is a super-2 number, since 2×231323330131² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231323330096 and 231323330105.

It is not an unprimeable number, because it can be changed into a prime (231323330137) 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, 1326391 + ... + 1490623.

It is an arithmetic number, because the mean of its divisors is an integer number (29406918870).

Almost surely, 2^231323330131 is an apocalyptic number.

231323330131 is a deficient number, since it is larger than the sum of its proper divisors (3932020829).

231323330131 is a wasteful number, since it uses less digits than its factorization.

231323330131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188165.

The product of its (nonzero) digits is 2916, while the sum is 25.

Adding to 231323330131 its reverse (131033323132), we get a palindrome (362356653263).

The spelling of 231323330131 in words is "two hundred thirty-one billion, three hundred twenty-three million, three hundred thirty thousand, one hundred thirty-one".