51020510005 has 4 divisors (see below), whose sum is σ = 61224612012. Its totient is φ = 40816408000.

The previous prime is 51020509997. The next prime is 51020510017. The reversal of 51020510005 is 50001502015.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32825467684 + 18195042321 = 181178^2 + 134889^2 .

It is not a de Polignac number, because 51020510005 - 2³ = 51020509997 is a prime.

It is a super-3 number, since 3×51020510005³ (a number of 33 digits) contains 333 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 (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5102050996 + ... + 5102051005.

It is an arithmetic number, because the mean of its divisors is an integer number (15306153003).

Almost surely, 2^51020510005 is an apocalyptic number.

It is an amenable number.

51020510005 is a deficient number, since it is larger than the sum of its proper divisors (10204102007).

51020510005 is a wasteful number, since it uses less digits than its factorization.

51020510005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10204102006.

The product of its (nonzero) digits is 250, while the sum is 19.

The spelling of 51020510005 in words is "fifty-one billion, twenty million, five hundred ten thousand, five".