13144405443431 has 4 divisors (see below), whose sum is σ = 13144697774664. Its totient is φ = 13144113112200.

The previous prime is 13144405443361. The next prime is 13144405443437. The reversal of 13144405443431 is 13434450444131.

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 13144405443431 - 2¹⁸ = 13144405181287 is a prime.

It is a super-2 number, since 2×13144405443431² (a number of 27 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 (13144405443437) 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, 146098160 + ... + 146188101.

It is an arithmetic number, because the mean of its divisors is an integer number (3286174443666).

Almost surely, 2^{13144405443431} is an apocalyptic number.

13144405443431 is a deficient number, since it is larger than the sum of its proper divisors (292331233).

13144405443431 is an equidigital number, since it uses as much as digits as its factorization.

13144405443431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292331232.

The product of its (nonzero) digits is 552960, while the sum is 41.

Adding to 13144405443431 its reverse (13434450444131), we get a palindrome (26578855887562).

The spelling of 13144405443431 in words is "thirteen trillion, one hundred forty-four billion, four hundred five million, four hundred forty-three thousand, four hundred thirty-one".