213543 has 16 divisors (see below), whose sum is σ = 345600. Its totient is φ = 129240.

The previous prime is 213539. The next prime is 213553. The reversal of 213543 is 345312.

It is not a de Polignac number, because 213543 - 2² = 213539 is a prime.

It is a super-2 number, since 2×213543² = 91201225698, which contains 22 as substring.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 213543.

It is not an unprimeable number, because it can be changed into a prime (213523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63 + ... + 656.

It is an arithmetic number, because the mean of its divisors is an integer number (21600).

2²¹³⁵⁴³ is an apocalyptic number.

213543 is a deficient number, since it is larger than the sum of its proper divisors (132057).

213543 is a wasteful number, since it uses less digits than its factorization.

213543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739 (or 733 counting only the distinct ones).

The product of its digits is 360, while the sum is 18.

The square root of 213543 is about 462.1071304362. The cubic root of 213543 is about 59.7716319030.

Adding to 213543 its reverse (345312), we get a palindrome (558855).

Subtracting 213543 from its reverse (345312), we obtain a square (131769 = 363²).

The spelling of 213543 in words is "two hundred thirteen thousand, five hundred forty-three".