1320224251543 has 4 divisors (see below), whose sum is σ = 1333295778888. Its totient is φ = 1307152724200.

The previous prime is 1320224251531. The next prime is 1320224251583. The reversal of 1320224251543 is 3451524220231.

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 1320224251543 - 2²⁹ = 1319687380631 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1320224251499 and 1320224251508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320224251583) 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, 6535763521 + ... + 6535763722.

It is an arithmetic number, because the mean of its divisors is an integer number (333323944722).

Almost surely, 2^{1320224251543} is an apocalyptic number.

1320224251543 is a deficient number, since it is larger than the sum of its proper divisors (13071527345).

1320224251543 is a wasteful number, since it uses less digits than its factorization.

1320224251543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13071527344.

The product of its (nonzero) digits is 57600, while the sum is 34.

Adding to 1320224251543 its reverse (3451524220231), we get a palindrome (4771748471774).

The spelling of 1320224251543 in words is "one trillion, three hundred twenty billion, two hundred twenty-four million, two hundred fifty-one thousand, five hundred forty-three".