51318051329 has 4 divisors (see below), whose sum is σ = 53549270976. Its totient is φ = 49086831684.

The previous prime is 51318051293. The next prime is 51318051409. The reversal of 51318051329 is 92315081315.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51318051329 - 2¹² = 51318047233 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 51318051292 and 51318051301.

It is not an unprimeable number, because it can be changed into a prime (51318081329) by changing a digit.

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, 1115609789 + ... + 1115609834.

It is an arithmetic number, because the mean of its divisors is an integer number (13387317744).

Almost surely, 2^51318051329 is an apocalyptic number.

It is an amenable number.

51318051329 is a deficient number, since it is larger than the sum of its proper divisors (2231219647).

51318051329 is a wasteful number, since it uses less digits than its factorization.

51318051329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2231219646.

The product of its (nonzero) digits is 32400, while the sum is 38.

The spelling of 51318051329 in words is "fifty-one billion, three hundred eighteen million, fifty-one thousand, three hundred twenty-nine".