51005551115 has 16 divisors (see below), whose sum is σ = 61659900000. Its totient is φ = 40502660352.

The previous prime is 51005551087. The next prime is 51005551123. The reversal of 51005551115 is 51115550015.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 51005551115 - 2⁸ = 51005550859 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 1093919 + ... + 1139591.

It is an arithmetic number, because the mean of its divisors is an integer number (3853743750).

Almost surely, 2^51005551115 is an apocalyptic number.

51005551115 is a deficient number, since it is larger than the sum of its proper divisors (10654348885).

51005551115 is a wasteful number, since it uses less digits than its factorization.

51005551115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47326.

The product of its (nonzero) digits is 3125, while the sum is 29.

The spelling of 51005551115 in words is "fifty-one billion, five million, five hundred fifty-one thousand, one hundred fifteen".