255312317 has 16 divisors (see below), whose sum is σ = 288360240. Its totient is φ = 224404992.

The previous prime is 255312251. The next prime is 255312331. The reversal of 255312317 is 713213552.

It can be written as a sum of positive squares in 8 ways, for example, as 143641 + 255168676 = 379^2 + 15974^2 .

It is a cyclic number.

It is not a de Polignac number, because 255312317 - 2⁸ = 255312061 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

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 255312317.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255312377) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22883 + ... + 32159.

It is an arithmetic number, because the mean of its divisors is an integer number (18022515).

Almost surely, 2^255312317 is an apocalyptic number.

It is an amenable number.

255312317 is a deficient number, since it is larger than the sum of its proper divisors (33047923).

255312317 is a wasteful number, since it uses less digits than its factorization.

255312317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9392.

The product of its digits is 6300, while the sum is 29.

The square root of 255312317 is about 15978.4954548293. The cubic root of 255312317 is about 634.3913543051.

Adding to 255312317 its reverse (713213552), we get a palindrome (968525869).

The spelling of 255312317 in words is "two hundred fifty-five million, three hundred twelve thousand, three hundred seventeen".