51255710561317 has 8 divisors (see below), whose sum is σ = 52909807968000. Its totient is φ = 49601656116480.

The previous prime is 51255710561311. The next prime is 51255710561353. The reversal of 51255710561317 is 71316501755215.

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 51255710561317 - 2³⁵ = 51221350822949 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 (51255710561311) 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, 8307103 + ... + 13096540.

It is an arithmetic number, because the mean of its divisors is an integer number (6613725996000).

Almost surely, 2^{51255710561317} is an apocalyptic number.

It is an amenable number.

51255710561317 is a deficient number, since it is larger than the sum of its proper divisors (1654097406683).

51255710561317 is a wasteful number, since it uses less digits than its factorization.

51255710561317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21480923.

The product of its (nonzero) digits is 1102500, while the sum is 49.

The spelling of 51255710561317 in words is "fifty-one trillion, two hundred fifty-five billion, seven hundred ten million, five hundred sixty-one thousand, three hundred seventeen".