2543423312503 has 4 divisors (see below), whose sum is σ = 2543426730688. Its totient is φ = 2543419894320.

The previous prime is 2543423312501. The next prime is 2543423312567. The reversal of 2543423312503 is 3052133243452.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2543423312503 - 2¹ = 2543423312501 is a prime.

It is a super-2 number, since 2×2543423312503² (a number of 26 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 (2543423312501) 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, 67158 + ... + 2256403.

It is an arithmetic number, because the mean of its divisors is an integer number (635856682672).

Almost surely, 2^{2543423312503} is an apocalyptic number.

2543423312503 is a deficient number, since it is larger than the sum of its proper divisors (3418185).

2543423312503 is a wasteful number, since it uses less digits than its factorization.

2543423312503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3418184.

The product of its (nonzero) digits is 259200, while the sum is 37.

Adding to 2543423312503 its reverse (3052133243452), we get a palindrome (5595556555955).

The spelling of 2543423312503 in words is "two trillion, five hundred forty-three billion, four hundred twenty-three million, three hundred twelve thousand, five hundred three".