12305140531 has 4 divisors (see below), whose sum is σ = 12305842632. Its totient is φ = 12304438432.

The previous prime is 12305140513. The next prime is 12305140541. The reversal of 12305140531 is 13504150321.

It is a happy number.

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 12305140531 - 2²⁵ = 12271586099 is a prime.

It is a super-2 number, since 2×12305140531² (a number of 21 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 = 12305140496 and 12305140505.

It is not an unprimeable number, because it can be changed into a prime (12305140541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 324070 + ... + 360043.

It is an arithmetic number, because the mean of its divisors is an integer number (3076460658).

Almost surely, 2^12305140531 is an apocalyptic number.

12305140531 is a deficient number, since it is larger than the sum of its proper divisors (702101).

12305140531 is an equidigital number, since it uses as much as digits as its factorization.

12305140531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702100.

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 12305140531 its reverse (13504150321), we get a palindrome (25809290852).

The spelling of 12305140531 in words is "twelve billion, three hundred five million, one hundred forty thousand, five hundred thirty-one".