51128279215 has 32 divisors (see below), whose sum is σ = 67110676416. Its totient is φ = 37164441600.

The previous prime is 51128279179. The next prime is 51128279231. The reversal of 51128279215 is 51297282115.

It is not a de Polignac number, because 51128279215 - 2²³ = 51119890607 is a prime.

It is a super-2 number, since 2×51128279215² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 6968689 + ... + 6976021.

It is an arithmetic number, because the mean of its divisors is an integer number (2097208638).

Almost surely, 2^51128279215 is an apocalyptic number.

51128279215 is a deficient number, since it is larger than the sum of its proper divisors (15982397201).

51128279215 is a wasteful number, since it uses less digits than its factorization.

51128279215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9019.

The product of its digits is 100800, while the sum is 43.

The spelling of 51128279215 in words is "fifty-one billion, one hundred twenty-eight million, two hundred seventy-nine thousand, two hundred fifteen".