531305 has 4 divisors (see below), whose sum is σ = 637572. Its totient is φ = 425040.

The previous prime is 531299. The next prime is 531331. The reversal of 531305 is 503135.

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 53824 + 477481 = 232^2 + 691^2 .

It is not a de Polignac number, because 531305 - 2¹² = 527209 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

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, 53126 + ... + 53135.

It is an arithmetic number, because the mean of its divisors is an integer number (159393).

2⁵³¹³⁰⁵ is an apocalyptic number.

It is an amenable number.

531305 is a deficient number, since it is larger than the sum of its proper divisors (106267).

531305 is a wasteful number, since it uses less digits than its factorization.

531305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106266.

The product of its (nonzero) digits is 225, while the sum is 17.

The square root of 531305 is about 728.9067155679. The cubic root of 531305 is about 80.9930898947.

It can be divided in two parts, 53130 and 5, that added together give a palindrome (53135).

The spelling of 531305 in words is "five hundred thirty-one thousand, three hundred five".