2551232321551 has 8 divisors (see below), whose sum is σ = 2747089639440. Its totient is φ = 2360462206848.

The previous prime is 2551232321543. The next prime is 2551232321557. The reversal of 2551232321551 is 1551232321552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2551232321551 - 2³ = 2551232321543 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2551232321551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2551232321557) 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 7 ways as a sum of consecutive naturals, for example, 1271799756 + ... + 1271801761.

It is an arithmetic number, because the mean of its divisors is an integer number (343386204930).

Almost surely, 2^{2551232321551} is an apocalyptic number.

2551232321551 is a deficient number, since it is larger than the sum of its proper divisors (195857317889).

2551232321551 is a wasteful number, since it uses less digits than its factorization.

2551232321551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2543601593.

The product of its digits is 90000, while the sum is 37.

Subtracting from 2551232321551 its reverse (1551232321552), we obtain a palindrome (999999999999).

The spelling of 2551232321551 in words is "two trillion, five hundred fifty-one billion, two hundred thirty-two million, three hundred twenty-one thousand, five hundred fifty-one".