12440043331 has 16 divisors (see below), whose sum is σ = 13072389120. Its totient is φ = 11825657920.

The previous prime is 12440043323. The next prime is 12440043359. The reversal of 12440043331 is 13334004421.

It is a cyclic number.

It is not a de Polignac number, because 12440043331 - 2³ = 12440043323 is a prime.

It is a super-2 number, since 2×12440043331² (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 = 12440043296 and 12440043305.

It is not an unprimeable number, because it can be changed into a prime (12440043311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 423210 + ... + 451648.

It is an arithmetic number, because the mean of its divisors is an integer number (817024320).

Almost surely, 2^12440043331 is an apocalyptic number.

12440043331 is a deficient number, since it is larger than the sum of its proper divisors (632345789).

12440043331 is a wasteful number, since it uses less digits than its factorization.

12440043331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28754.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 12440043331 its reverse (13334004421), we get a palindrome (25774047752).

The spelling of 12440043331 in words is "twelve billion, four hundred forty million, forty-three thousand, three hundred thirty-one".