51230555817 has 48 divisors (see below), whose sum is σ = 82685168640. Its totient is φ = 27634677984.

The previous prime is 51230555807. The next prime is 51230555881. The reversal of 51230555817 is 71855503215.

It is not a de Polignac number, because 51230555817 - 2⁷ = 51230555689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51230555807) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2133484 + ... + 2157362.

It is an arithmetic number, because the mean of its divisors is an integer number (1722607680).

Almost surely, 2^51230555817 is an apocalyptic number.

51230555817 is a gapful number since it is divisible by the number (57) formed by its first and last digit.

It is an amenable number.

51230555817 is a deficient number, since it is larger than the sum of its proper divisors (31454612823).

51230555817 is a wasteful number, since it uses less digits than its factorization.

51230555817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24210 (or 24191 counting only the distinct ones).

The product of its (nonzero) digits is 210000, while the sum is 42.

The spelling of 51230555817 in words is "fifty-one billion, two hundred thirty million, five hundred fifty-five thousand, eight hundred seventeen".