12043311531 has 8 divisors (see below), whose sum is σ = 16173272640. Its totient is φ = 7971112392.

The previous prime is 12043311521. The next prime is 12043311563. The reversal of 12043311531 is 13511334021.

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

It is not a de Polignac number, because 12043311531 - 2⁹ = 12043311019 is a prime.

It is a super-3 number, since 3×12043311531³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (12043311521) 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, 14440005 + ... + 14440838.

It is an arithmetic number, because the mean of its divisors is an integer number (2021659080).

Almost surely, 2^12043311531 is an apocalyptic number.

12043311531 is a deficient number, since it is larger than the sum of its proper divisors (4129961109).

12043311531 is a wasteful number, since it uses less digits than its factorization.

12043311531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28880985.

The product of its (nonzero) digits is 1080, while the sum is 24.

Adding to 12043311531 its reverse (13511334021), we get a palindrome (25554645552).

The spelling of 12043311531 in words is "twelve billion, forty-three million, three hundred eleven thousand, five hundred thirty-one".