13544223431 has 4 divisors (see below), whose sum is σ = 13773786600. Its totient is φ = 13314660264.

The previous prime is 13544223421. The next prime is 13544223499. The reversal of 13544223431 is 13432244531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13432244531 = 6763 ⋅1986137.

It is a cyclic number.

It is not a de Polignac number, because 13544223431 - 2³⁰ = 12470481607 is a prime.

It is a super-2 number, since 2×13544223431² (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 (13544223401) 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, 114781496 + ... + 114781613.

It is an arithmetic number, because the mean of its divisors is an integer number (3443446650).

Almost surely, 2^13544223431 is an apocalyptic number.

13544223431 is a deficient number, since it is larger than the sum of its proper divisors (229563169).

13544223431 is an equidigital number, since it uses as much as digits as its factorization.

13544223431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229563168.

The product of its digits is 34560, while the sum is 32.

Adding to 13544223431 its reverse (13432244531), we get a palindrome (26976467962).

The spelling of 13544223431 in words is "thirteen billion, five hundred forty-four million, two hundred twenty-three thousand, four hundred thirty-one".