51312304513 has 8 divisors (see below), whose sum is σ = 52020224000. Its totient is φ = 50604520608.

The previous prime is 51312304507. The next prime is 51312304523. The reversal of 51312304513 is 31540321315.

It is a happy number.

51312304513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51312304513 - 2⁵ = 51312304481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51312304523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 906868 + ... + 961786.

It is an arithmetic number, because the mean of its divisors is an integer number (6502528000).

Almost surely, 2^51312304513 is an apocalyptic number.

It is an amenable number.

51312304513 is a deficient number, since it is larger than the sum of its proper divisors (707919487).

51312304513 is a wasteful number, since it uses less digits than its factorization.

51312304513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67791.

The product of its (nonzero) digits is 5400, while the sum is 28.

Adding to 51312304513 its reverse (31540321315), we get a palindrome (82852625828).

The spelling of 51312304513 in words is "fifty-one billion, three hundred twelve million, three hundred four thousand, five hundred thirteen".