255317555 has 8 divisors (see below), whose sum is σ = 307111344. Its totient is φ = 203767200.

The previous prime is 255317527. The next prime is 255317591. The reversal of 255317555 is 555713552.

It is a happy number.

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

It is not a de Polignac number, because 255317555 - 2⁸ = 255317299 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58541 + ... + 62750.

It is an arithmetic number, because the mean of its divisors is an integer number (38388918).

Almost surely, 2^255317555 is an apocalyptic number.

255317555 is a deficient number, since it is larger than the sum of its proper divisors (51793789).

255317555 is a wasteful number, since it uses less digits than its factorization.

255317555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121717.

The product of its digits is 131250, while the sum is 38.

The square root of 255317555 is about 15978.6593617863. The cubic root of 255317555 is about 634.3956926768.

The spelling of 255317555 in words is "two hundred fifty-five million, three hundred seventeen thousand, five hundred fifty-five".