517255 has 4 divisors (see below), whose sum is σ = 620712. Its totient is φ = 413800.

The previous prime is 517249. The next prime is 517261. The reversal of 517255 is 552715.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 552715 = 5 ⋅110543.

It is an interprime number because it is at equal distance from previous prime (517249) and next prime (517261).

It is not a de Polignac number, because 517255 - 2¹³ = 509063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51721 + ... + 51730.

It is an arithmetic number, because the mean of its divisors is an integer number (155178).

2⁵¹⁷²⁵⁵ is an apocalyptic number.

517255 is a deficient number, since it is larger than the sum of its proper divisors (103457).

517255 is a wasteful number, since it uses less digits than its factorization.

517255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103456.

The product of its digits is 1750, while the sum is 25.

The square root of 517255 is about 719.2044215659. The cubic root of 517255 is about 80.2727668378.

The spelling of 517255 in words is "five hundred seventeen thousand, two hundred fifty-five".