255305331517 has 8 divisors (see below), whose sum is σ = 257800402496. Its totient is φ = 252810575712.

The previous prime is 255305331511. The next prime is 255305331529. The reversal of 255305331517 is 715133503552.

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 255305331517 - 2⁷ = 255305331389 is a prime.

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 255305331517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255305331511) 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, 1757038 + ... + 1896784.

It is an arithmetic number, because the mean of its divisors is an integer number (32225050312).

Almost surely, 2^255305331517 is an apocalyptic number.

It is an amenable number.

255305331517 is a deficient number, since it is larger than the sum of its proper divisors (2495070979).

255305331517 is a wasteful number, since it uses less digits than its factorization.

255305331517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157587.

The product of its (nonzero) digits is 236250, while the sum is 40.

The spelling of 255305331517 in words is "two hundred fifty-five billion, three hundred five million, three hundred thirty-one thousand, five hundred seventeen".