51340420816513 has 8 divisors (see below), whose sum is σ = 51349137840000. Its totient is φ = 51331704517488.

The previous prime is 51340420816481. The next prime is 51340420816523. The reversal of 51340420816513 is 31561802404315.

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 51340420816513 - 2⁵ = 51340420816481 is a prime.

It is a super-2 number, since 2×51340420816513² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51340420816513.

It is not an unprimeable number, because it can be changed into a prime (51340420816523) 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, 152266170 + ... + 152602972.

It is an arithmetic number, because the mean of its divisors is an integer number (6418642230000).

Almost surely, 2^{51340420816513} is an apocalyptic number.

It is an amenable number.

51340420816513 is a deficient number, since it is larger than the sum of its proper divisors (8717023487).

51340420816513 is a wasteful number, since it uses less digits than its factorization.

51340420816513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362231.

The product of its (nonzero) digits is 345600, while the sum is 43.

The spelling of 51340420816513 in words is "fifty-one trillion, three hundred forty billion, four hundred twenty million, eight hundred sixteen thousand, five hundred thirteen".