51011506115 has 12 divisors (see below), whose sum is σ = 62063871984. Its totient is φ = 40250153664.

The previous prime is 51011506111. The next prime is 51011506151. The reversal of 51011506115 is 51160511015.

It is not a de Polignac number, because 51011506115 - 2² = 51011506111 is a prime.

It is a super-2 number, since 2×51011506115² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51011506111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 930599 + ... + 983888.

It is an arithmetic number, because the mean of its divisors is an integer number (5171989332).

Almost surely, 2^51011506115 is an apocalyptic number.

51011506115 is a deficient number, since it is larger than the sum of its proper divisors (11052365869).

51011506115 is an equidigital number, since it uses as much as digits as its factorization.

51011506115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1914638 (or 1914565 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 26.

The spelling of 51011506115 in words is "fifty-one billion, eleven million, five hundred six thousand, one hundred fifteen".