51312320522551 has 32 divisors (see below), whose sum is σ = 56775483752256. Its totient is φ = 45986603520000.

The previous prime is 51312320522473. The next prime is 51312320522651. The reversal of 51312320522551 is 15522502321315.

51312320522551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51312320522551 - 2²⁷ = 51312186304823 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 51312320522551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51312320522651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 265411261 + ... + 265604521.

It is an arithmetic number, because the mean of its divisors is an integer number (1774233867258).

Almost surely, 2^{51312320522551} is an apocalyptic number.

51312320522551 is a deficient number, since it is larger than the sum of its proper divisors (5463163229705).

51312320522551 is a wasteful number, since it uses less digits than its factorization.

51312320522551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194403.

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

Adding to 51312320522551 its reverse (15522502321315), we get a palindrome (66834822843866).

The spelling of 51312320522551 in words is "fifty-one trillion, three hundred twelve billion, three hundred twenty million, five hundred twenty-two thousand, five hundred fifty-one".