13443455434431 has 32 divisors (see below), whose sum is σ = 21263936479488. Its totient is φ = 7461030320640.

The previous prime is 13443455434427. The next prime is 13443455434439.

13443455434431 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 13443455434431 - 2² = 13443455434427 is a prime.

It is a super-2 number, since 2×13443455434431² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13443455434439) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 323808685 + ... + 323850198.

It is an arithmetic number, because the mean of its divisors is an integer number (664498014984).

Almost surely, 2^{13443455434431} is an apocalyptic number.

13443455434431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13443455434431 is a deficient number, since it is larger than the sum of its proper divisors (7820481045057).

13443455434431 is a wasteful number, since it uses less digits than its factorization.

13443455434431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647658951.

The product of its digits is 8294400, while the sum is 48.

It can be divided in two parts, 1344345 and 5434431, that added together give a palindrome (6778776).

The spelling of 13443455434431 in words is "thirteen trillion, four hundred forty-three billion, four hundred fifty-five million, four hundred thirty-four thousand, four hundred thirty-one".