213541 has 4 divisors (see below), whose sum is σ = 224800. Its totient is φ = 202284.

The previous prime is 213539. The next prime is 213553. The reversal of 213541 is 145312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 213541 - 2¹ = 213539 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 (213641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5601 + ... + 5638.

It is an arithmetic number, because the mean of its divisors is an integer number (56200).

2²¹³⁵⁴¹ is an apocalyptic number.

It is an amenable number.

213541 is a deficient number, since it is larger than the sum of its proper divisors (11259).

213541 is a wasteful number, since it uses less digits than its factorization.

213541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11258.

The product of its digits is 120, while the sum is 16.

The square root of 213541 is about 462.1049664308. The cubic root of 213541 is about 59.7714452994.

Adding to 213541 its reverse (145312), we get a palindrome (358853).

The spelling of 213541 in words is "two hundred thirteen thousand, five hundred forty-one".