51000510105 has 48 divisors (see below), whose sum is σ = 91118683344. Its totient is φ = 26369349120.

The previous prime is 51000510103. The next prime is 51000510161. The reversal of 51000510105 is 50101500015.

51000510105 is a `hidden beast` number, since 51 + 0 + 0 + 0 + 510 + 105 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 3050021529 + 47950488576 = 55227^2 + 218976^2 .

It is not a de Polignac number, because 51000510105 - 2¹ = 51000510103 is a prime.

It is a super-2 number, since 2×51000510105² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51000510103) 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, 405915 + ... + 516495.

It is an arithmetic number, because the mean of its divisors is an integer number (1898305903).

Almost surely, 2^51000510105 is an apocalyptic number.

It is an amenable number.

51000510105 is a deficient number, since it is larger than the sum of its proper divisors (40118173239).

51000510105 is a wasteful number, since it uses less digits than its factorization.

51000510105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110906 (or 110903 counting only the distinct ones).

The product of its (nonzero) digits is 125, while the sum is 18.

The spelling of 51000510105 in words is "fifty-one billion, five hundred ten thousand, one hundred five".