213005647 has 2 divisors, whose sum is σ = 213005648. Its totient is φ = 213005646.

The previous prime is 213005627. The next prime is 213005651. The reversal of 213005647 is 746500312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213005647 - 2¹¹ = 213003599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213005627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106502823 + 106502824.

It is an arithmetic number, because the mean of its divisors is an integer number (106502824).

Almost surely, 2^213005647 is an apocalyptic number.

213005647 is a deficient number, since it is larger than the sum of its proper divisors (1).

213005647 is an equidigital number, since it uses as much as digits as its factorization.

213005647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 213005647 is about 14594.7129810764. The cubic root of 213005647 is about 597.2145396210.

Adding to 213005647 its reverse (746500312), we get a palindrome (959505959).

The spelling of 213005647 in words is "two hundred thirteen million, five thousand, six hundred forty-seven".