255117017 has 4 divisors (see below), whose sum is σ = 258190800. Its totient is φ = 252043236.

The previous prime is 255117013. The next prime is 255117029. The reversal of 255117017 is 710711552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 255117017 - 2² = 255117013 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255117013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1536767 + ... + 1536932.

It is an arithmetic number, because the mean of its divisors is an integer number (64547700).

Almost surely, 2^255117017 is an apocalyptic number.

It is an amenable number.

255117017 is a deficient number, since it is larger than the sum of its proper divisors (3073783).

255117017 is an equidigital number, since it uses as much as digits as its factorization.

255117017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3073782.

The product of its (nonzero) digits is 2450, while the sum is 29.

The square root of 255117017 is about 15972.3829468242. The cubic root of 255117017 is about 634.2295547782.

Adding to 255117017 its reverse (710711552), we get a palindrome (965828569).

The spelling of 255117017 in words is "two hundred fifty-five million, one hundred seventeen thousand, seventeen".