255731047386217 has 8 divisors (see below), whose sum is σ = 275404142192256. Its totient is φ = 236058163405392.

The previous prime is 255731047386187. The next prime is 255731047386229. The reversal of 255731047386217 is 712683740137552.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255731047386217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255731047386917) 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, 50182513 + ... + 55043134.

It is an arithmetic number, because the mean of its divisors is an integer number (34425517774032).

Almost surely, 2^{255731047386217} is an apocalyptic number.

It is an amenable number.

255731047386217 is a deficient number, since it is larger than the sum of its proper divisors (19673094806039).

255731047386217 is a wasteful number, since it uses less digits than its factorization.

255731047386217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105412607.

The product of its (nonzero) digits is 59270400, while the sum is 61.

The spelling of 255731047386217 in words is "two hundred fifty-five trillion, seven hundred thirty-one billion, forty-seven million, three hundred eighty-six thousand, two hundred seventeen".