213243211 has 2 divisors, whose sum is σ = 213243212. Its totient is φ = 213243210.

The previous prime is 213243179. The next prime is 213243259. The reversal of 213243211 is 112342312.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213243211 - 2⁵ = 213243179 is a prime.

It is not a weakly prime, because it can be changed into another prime (213243271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106621605 + 106621606.

It is an arithmetic number, because the mean of its divisors is an integer number (106621606).

Almost surely, 2^213243211 is an apocalyptic number.

213243211 is a deficient number, since it is larger than the sum of its proper divisors (1).

213243211 is an equidigital number, since it uses as much as digits as its factorization.

213243211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 19.

The square root of 213243211 is about 14602.8494137274. The cubic root of 213243211 is about 597.4364804706.

Adding to 213243211 its reverse (112342312), we get a palindrome (325585523).

The spelling of 213243211 in words is "two hundred thirteen million, two hundred forty-three thousand, two hundred eleven".