213540213 has 16 divisors (see below), whose sum is σ = 303851520. Its totient is φ = 132926976.

The previous prime is 213540203. The next prime is 213540251. The reversal of 213540213 is 312045312.

It is not a de Polignac number, because 213540213 - 2⁶ = 213540149 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213540213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213540203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10008 + ... + 22961.

It is an arithmetic number, because the mean of its divisors is an integer number (18990720).

Almost surely, 2^213540213 is an apocalyptic number.

It is an amenable number.

213540213 is a deficient number, since it is larger than the sum of its proper divisors (90311307).

213540213 is a wasteful number, since it uses less digits than its factorization.

213540213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33116.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 213540213 is about 14613.0151919445. The cubic root of 213540213 is about 597.7137187062.

Adding to 213540213 its reverse (312045312), we get a palindrome (525585525).

The spelling of 213540213 in words is "two hundred thirteen million, five hundred forty thousand, two hundred thirteen".