51421313012511 has 64 divisors (see below), whose sum is σ = 79220266610688. Its totient is φ = 29386711799808.

The previous prime is 51421313012507. The next prime is 51421313012513. The reversal of 51421313012511 is 11521031312415.

51421313012511 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 51421313012511 - 2² = 51421313012507 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51421313012513) 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 63 ways as a sum of consecutive naturals, for example, 43271890 + ... + 44444336.

It is an arithmetic number, because the mean of its divisors is an integer number (1237816665792).

Almost surely, 2^{51421313012511} is an apocalyptic number.

51421313012511 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

51421313012511 is a deficient number, since it is larger than the sum of its proper divisors (27798953598177).

51421313012511 is a wasteful number, since it uses less digits than its factorization.

51421313012511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1173360.

The product of its (nonzero) digits is 3600, while the sum is 30.

Adding to 51421313012511 its reverse (11521031312415), we get a palindrome (62942344324926).

The spelling of 51421313012511 in words is "fifty-one trillion, four hundred twenty-one billion, three hundred thirteen million, twelve thousand, five hundred eleven".