51823200505 has 4 divisors (see below), whose sum is σ = 62187840612. Its totient is φ = 41458560400.

The previous prime is 51823200497. The next prime is 51823200523. The reversal of 51823200505 is 50500232815.

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 18189107689 + 33634092816 = 134867^2 + 183396^2 .

It is not a de Polignac number, because 51823200505 - 2³ = 51823200497 is a prime.

It is a super-2 number, since 2×51823200505² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5182320046 + ... + 5182320055.

It is an arithmetic number, because the mean of its divisors is an integer number (15546960153).

Almost surely, 2^51823200505 is an apocalyptic number.

It is an amenable number.

51823200505 is a deficient number, since it is larger than the sum of its proper divisors (10364640107).

51823200505 is a wasteful number, since it uses less digits than its factorization.

51823200505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10364640106.

The product of its (nonzero) digits is 12000, while the sum is 31.

The spelling of 51823200505 in words is "fifty-one billion, eight hundred twenty-three million, two hundred thousand, five hundred five".