12440010431 has 4 divisors (see below), whose sum is σ = 12704691552. Its totient is φ = 12175329312.

The previous prime is 12440010307. The next prime is 12440010461. The reversal of 12440010431 is 13401004421.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12440010431 is a prime.

It is a super-2 number, since 2×12440010431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12440010461) 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, 132340490 + ... + 132340583.

It is an arithmetic number, because the mean of its divisors is an integer number (3176172888).

Almost surely, 2^12440010431 is an apocalyptic number.

12440010431 is a deficient number, since it is larger than the sum of its proper divisors (264681121).

12440010431 is an equidigital number, since it uses as much as digits as its factorization.

12440010431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264681120.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 12440010431 its reverse (13401004421), we get a palindrome (25841014852).

The spelling of 12440010431 in words is "twelve billion, four hundred forty million, ten thousand, four hundred thirty-one".