531543 has 8 divisors (see below), whose sum is σ = 713728. Its totient is φ = 351864.

The previous prime is 531521. The next prime is 531547. The reversal of 531543 is 345135.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 531543 - 2⁸ = 531287 is a prime.

It is a d-powerful number, because it can be written as 5 + 3³ + 5 + 1 + 4³ + 3¹² .

It is a Duffinian number.

531543 is a lucky number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55 + ... + 1032.

It is an arithmetic number, because the mean of its divisors is an integer number (89216).

2⁵³¹⁵⁴³ is an apocalyptic number.

531543 is a deficient number, since it is larger than the sum of its proper divisors (182185).

531543 is a wasteful number, since it uses less digits than its factorization.

531543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1253.

The product of its digits is 900, while the sum is 21.

The square root of 531543 is about 729.0699554912. The cubic root of 531543 is about 81.0051818054.

Adding to 531543 its reverse (345135), we get a palindrome (876678).

It can be divided in two parts, 53 and 1543, that added together give a triangular number (1596 = T₅₆).

The spelling of 531543 in words is "five hundred thirty-one thousand, five hundred forty-three".