2543512300321 has 4 divisors (see below), whose sum is σ = 2549029681044. Its totient is φ = 2537994919600.

The previous prime is 2543512300313. The next prime is 2543512300331. The reversal of 2543512300321 is 1230032153452.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1789548307600 + 753963992721 = 1337740^2 + 868311^2 .

It is a cyclic number.

It is not a de Polignac number, because 2543512300321 - 2³ = 2543512300313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2543512300331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2758689670 + ... + 2758690591.

It is an arithmetic number, because the mean of its divisors is an integer number (637257420261).

Almost surely, 2^{2543512300321} is an apocalyptic number.

It is an amenable number.

2543512300321 is a deficient number, since it is larger than the sum of its proper divisors (5517380723).

2543512300321 is an equidigital number, since it uses as much as digits as its factorization.

2543512300321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5517380722.

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 2543512300321 its reverse (1230032153452), we get a palindrome (3773544453773).

The spelling of 2543512300321 in words is "two trillion, five hundred forty-three billion, five hundred twelve million, three hundred thousand, three hundred twenty-one".