511255 has 4 divisors (see below), whose sum is σ = 613512. Its totient is φ = 409000.

The previous prime is 511243. The next prime is 511261. The reversal of 511255 is 552115.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 511255 - 2⁵ = 511223 is a prime.

It is a super-2 number, since 2×511255² = 522763350050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51121 + ... + 51130.

It is an arithmetic number, because the mean of its divisors is an integer number (153378).

2⁵¹¹²⁵⁵ is an apocalyptic number.

511255 is a deficient number, since it is larger than the sum of its proper divisors (102257).

511255 is a wasteful number, since it uses less digits than its factorization.

511255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102256.

The product of its digits is 250, while the sum is 19.

The square root of 511255 is about 715.0209787132. The cubic root of 511255 is about 79.9611790814.

It can be divided in two parts, 511 and 255, that multiplied together give a triangular number (130305 = T₅₁₀).

The spelling of 511255 in words is "five hundred eleven thousand, two hundred fifty-five".