213020347 has 2 divisors, whose sum is σ = 213020348. Its totient is φ = 213020346.

The previous prime is 213020333. The next prime is 213020369. The reversal of 213020347 is 743020312.

It is an a-pointer prime, because the next prime (213020369) can be obtained adding 213020347 to its sum of digits (22).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213020347 - 2¹⁹ = 212496059 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (213020317) 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 as a sum of consecutive naturals, namely, 106510173 + 106510174.

It is an arithmetic number, because the mean of its divisors is an integer number (106510174).

Almost surely, 2^213020347 is an apocalyptic number.

213020347 is a deficient number, since it is larger than the sum of its proper divisors (1).

213020347 is an equidigital number, since it uses as much as digits as its factorization.

213020347 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 213020347 is about 14595.2165794140. The cubic root of 213020347 is about 597.2282776790.

Adding to 213020347 its reverse (743020312), we get a palindrome (956040659).

The spelling of 213020347 in words is "two hundred thirteen million, twenty thousand, three hundred forty-seven".