51344123305 has 4 divisors (see below), whose sum is σ = 61612947972. Its totient is φ = 41075298640.

The previous prime is 51344123293. The next prime is 51344123309. The reversal of 51344123305 is 50332144315.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50332144315 = 5 ⋅10066428863.

It can be written as a sum of positive squares in 2 ways, for example, as 40991671296 + 10352452009 = 202464^2 + 101747^2 .

It is not a de Polignac number, because 51344123305 - 2⁵ = 51344123273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51344123309) by changing a digit.

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, 5134412326 + ... + 5134412335.

It is an arithmetic number, because the mean of its divisors is an integer number (15403236993).

Almost surely, 2^51344123305 is an apocalyptic number.

It is an amenable number.

51344123305 is a deficient number, since it is larger than the sum of its proper divisors (10268824667).

51344123305 is a wasteful number, since it uses less digits than its factorization.

51344123305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10268824666.

The product of its (nonzero) digits is 21600, while the sum is 31.

The spelling of 51344123305 in words is "fifty-one billion, three hundred forty-four million, one hundred twenty-three thousand, three hundred five".