51200005 has 16 divisors (see below), whose sum is σ = 65412144. Its totient is φ = 38338560.

The previous prime is 51199991. The next prime is 51200027. The reversal of 51200005 is 50000215.

It can be written as a sum of positive squares in 8 ways, for example, as 9235521 + 41964484 = 3039^2 + 6478^2 .

It is not a de Polignac number, because 51200005 - 2⁹ = 51199493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14845 + ... + 17965.

It is an arithmetic number, because the mean of its divisors is an integer number (4088259).

Almost surely, 2^51200005 is an apocalyptic number.

It is an amenable number.

51200005 is a deficient number, since it is larger than the sum of its proper divisors (14212139).

51200005 is a wasteful number, since it uses less digits than its factorization.

51200005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3336.

The product of its (nonzero) digits is 50, while the sum is 13.

The square root of 51200005 is about 7155.4178773849. The cubic root of 51200005 is about 371.3271187765.

The spelling of 51200005 in words is "fifty-one million, two hundred thousand, five".