231340340031 has 4 divisors (see below), whose sum is σ = 308453786712. Its totient is φ = 154226893352.

The previous prime is 231340340009. The next prime is 231340340041. The reversal of 231340340031 is 130043043132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 231340340031 - 2⁹ = 231340339519 is a prime.

It is a super-2 number, since 2×231340340031² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231340339983 and 231340340010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231340340041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38556723336 + ... + 38556723341.

It is an arithmetic number, because the mean of its divisors is an integer number (77113446678).

Almost surely, 2^231340340031 is an apocalyptic number.

231340340031 is a deficient number, since it is larger than the sum of its proper divisors (77113446681).

231340340031 is an equidigital number, since it uses as much as digits as its factorization.

231340340031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77113446680.

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 231340340031 its reverse (130043043132), we get a palindrome (361383383163).

The spelling of 231340340031 in words is "two hundred thirty-one billion, three hundred forty million, three hundred forty thousand, thirty-one".