2551531515244 has 12 divisors (see below), whose sum is σ = 4727837807784. Its totient is φ = 1200720713024.

The previous prime is 2551531515229. The next prime is 2551531515289. The reversal of 2551531515244 is 4425151351552.

It is a self number, because there is not a number n which added to its sum of digits gives 2551531515244.

It is an unprimeable number.

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, 18761261074 + ... + 18761261209.

It is an arithmetic number, because the mean of its divisors is an integer number (393986483982).

Almost surely, 2^{2551531515244} is an apocalyptic number.

It is an amenable number.

2551531515244 is a deficient number, since it is larger than the sum of its proper divisors (2176306292540).

2551531515244 is a wasteful number, since it uses less digits than its factorization.

2551531515244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37522522304 (or 37522522302 counting only the distinct ones).

The product of its digits is 600000, while the sum is 43.

Adding to 2551531515244 its reverse (4425151351552), we get a palindrome (6976682866796).

The spelling of 2551531515244 in words is "two trillion, five hundred fifty-one billion, five hundred thirty-one million, five hundred fifteen thousand, two hundred forty-four".