51005605115 has 32 divisors (see below), whose sum is σ = 64379031552. Its totient is φ = 38719296000.

The previous prime is 51005605111. The next prime is 51005605139. The reversal of 51005605115 is 51150650015.

It is a happy number.

It is not a de Polignac number, because 51005605115 - 2² = 51005605111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51005605111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7507370 + ... + 7514160.

It is an arithmetic number, because the mean of its divisors is an integer number (2011844736).

Almost surely, 2^51005605115 is an apocalyptic number.

51005605115 is a deficient number, since it is larger than the sum of its proper divisors (13373426437).

51005605115 is a wasteful number, since it uses less digits than its factorization.

51005605115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7331.

The product of its (nonzero) digits is 3750, while the sum is 29.

The spelling of 51005605115 in words is "fifty-one billion, five million, six hundred five thousand, one hundred fifteen".