213006647 has 4 divisors (see below), whose sum is σ = 243436176. Its totient is φ = 182577120.

The previous prime is 213006643. The next prime is 213006659. The reversal of 213006647 is 746600312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 213006647 - 2² = 213006643 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213006643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15214754 + ... + 15214767.

It is an arithmetic number, because the mean of its divisors is an integer number (60859044).

Almost surely, 2^213006647 is an apocalyptic number.

213006647 is a deficient number, since it is larger than the sum of its proper divisors (30429529).

213006647 is an equidigital number, since it uses as much as digits as its factorization.

213006647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30429528.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 213006647 is about 14594.7472400176. The cubic root of 213006647 is about 597.2154742028.

Adding to 213006647 its reverse (746600312), we get a palindrome (959606959).

The spelling of 213006647 in words is "two hundred thirteen million, six thousand, six hundred forty-seven".