2551232321543 has 2 divisors, whose sum is σ = 2551232321544. Its totient is φ = 2551232321542.

The previous prime is 2551232321509. The next prime is 2551232321557. The reversal of 2551232321543 is 3451232321552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2551232321543 - 2¹⁴ = 2551232305159 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2551232321497 and 2551232321506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2551232320543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1275616160771 + 1275616160772.

It is an arithmetic number, because the mean of its divisors is an integer number (1275616160772).

Almost surely, 2^{2551232321543} is an apocalyptic number.

2551232321543 is a deficient number, since it is larger than the sum of its proper divisors (1).

2551232321543 is an equidigital number, since it uses as much as digits as its factorization.

2551232321543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216000, while the sum is 38.

Subtracting 2551232321543 from its reverse (3451232321552), we obtain a palindrome (900000000009).

The spelling of 2551232321543 in words is "two trillion, five hundred fifty-one billion, two hundred thirty-two million, three hundred twenty-one thousand, five hundred forty-three".