51343665535317 has 4 divisors (see below), whose sum is σ = 68458220713760. Its totient is φ = 34229110356876.

The previous prime is 51343665535177. The next prime is 51343665535319. The reversal of 51343665535317 is 71353556634315.

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 not a de Polignac number, because 51343665535317 - 2¹⁹ = 51343665011029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51343665535319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8557277589217 + ... + 8557277589222.

It is an arithmetic number, because the mean of its divisors is an integer number (17114555178440).

Almost surely, 2^{51343665535317} is an apocalyptic number.

It is an amenable number.

51343665535317 is a deficient number, since it is larger than the sum of its proper divisors (17114555178443).

51343665535317 is a wasteful number, since it uses less digits than its factorization.

51343665535317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17114555178442.

The product of its digits is 51030000, while the sum is 57.

The spelling of 51343665535317 in words is "fifty-one trillion, three hundred forty-three billion, six hundred sixty-five million, five hundred thirty-five thousand, three hundred seventeen".