511205 has 4 divisors (see below), whose sum is σ = 613452. Its totient is φ = 408960.

The previous prime is 511201. The next prime is 511211. The reversal of 511205 is 502115.

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

It can be written as a sum of positive squares in 2 ways, for example, as 264196 + 247009 = 514^2 + 497^2 .

It is not a de Polignac number, because 511205 - 2² = 511201 is a prime.

It is a super-2 number, since 2×511205² = 522661104050, which contains 22 as substring.

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 511205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (511201) 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, 51116 + ... + 51125.

It is an arithmetic number, because the mean of its divisors is an integer number (153363).

2⁵¹¹²⁰⁵ is an apocalyptic number.

It is an amenable number.

511205 is a deficient number, since it is larger than the sum of its proper divisors (102247).

511205 is a wasteful number, since it uses less digits than its factorization.

511205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102246.

The product of its (nonzero) digits is 50, while the sum is 14.

The square root of 511205 is about 714.9860138492. The cubic root of 511205 is about 79.9585723005.

The spelling of 511205 in words is "five hundred eleven thousand, two hundred five".