213543101 has 2 divisors, whose sum is σ = 213543102. Its totient is φ = 213543100.

The previous prime is 213543091. The next prime is 213543149. The reversal of 213543101 is 101345312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 147136900 + 66406201 = 12130^2 + 8149^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213543101 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213543191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106771550 + 106771551.

It is an arithmetic number, because the mean of its divisors is an integer number (106771551).

Almost surely, 2^213543101 is an apocalyptic number.

It is an amenable number.

213543101 is a deficient number, since it is larger than the sum of its proper divisors (1).

213543101 is an equidigital number, since it uses as much as digits as its factorization.

213543101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 213543101 is about 14613.1140076303. The cubic root of 213543101 is about 597.7164132642.

Adding to 213543101 its reverse (101345312), we get a palindrome (314888413).

The spelling of 213543101 in words is "two hundred thirteen million, five hundred forty-three thousand, one hundred one".