53543 has 4 divisors (see below), whose sum is σ = 61200. Its totient is φ = 45888.

The previous prime is 53527. The next prime is 53549. The reversal of 53543 is 34535.

53543 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34535 = 5 ⋅6907.

It is a cyclic number.

It is not a de Polignac number, because 53543 - 2⁴ = 53527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53549) 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, 3818 + ... + 3831.

It is an arithmetic number, because the mean of its divisors is an integer number (15300).

2⁵³⁵⁴³ is an apocalyptic number.

53543 is a deficient number, since it is larger than the sum of its proper divisors (7657).

53543 is an equidigital number, since it uses as much as digits as its factorization.

53543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7656.

The product of its digits is 900, while the sum is 20.

The square root of 53543 is about 231.3936040603. The cubic root of 53543 is about 37.6907026303.

It can be divided in two parts, 535 and 43, that multiplied together give a triangular number (23005 = T₂₁₄).

The spelling of 53543 in words is "fifty-three thousand, five hundred forty-three".