213043223 has 2 divisors, whose sum is σ = 213043224. Its totient is φ = 213043222.

The previous prime is 213043213. The next prime is 213043247. The reversal of 213043223 is 322340312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213043223 - 2⁸ = 213042967 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 213043195 and 213043204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213043213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106521611 + 106521612.

It is an arithmetic number, because the mean of its divisors is an integer number (106521612).

Almost surely, 2^213043223 is an apocalyptic number.

213043223 is a deficient number, since it is larger than the sum of its proper divisors (1).

213043223 is an equidigital number, since it uses as much as digits as its factorization.

213043223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 213043223 is about 14596.0002397917. Note that the first 3 decimals coincide. The cubic root of 213043223 is about 597.2496554569.

Adding to 213043223 its reverse (322340312), we get a palindrome (535383535).

The spelling of 213043223 in words is "two hundred thirteen million, forty-three thousand, two hundred twenty-three".