213803666647 has 2 divisors, whose sum is σ = 213803666648. Its totient is φ = 213803666646.

The previous prime is 213803666627. The next prime is 213803666677. The reversal of 213803666647 is 746666308312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213803666647 - 2³¹ = 211656182999 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213803666594 and 213803666603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213803666627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106901833323 + 106901833324.

It is an arithmetic number, because the mean of its divisors is an integer number (106901833324).

Almost surely, 2^213803666647 is an apocalyptic number.

213803666647 is a deficient number, since it is larger than the sum of its proper divisors (1).

213803666647 is an equidigital number, since it uses as much as digits as its factorization.

213803666647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5225472, while the sum is 52.

The spelling of 213803666647 in words is "two hundred thirteen billion, eight hundred three million, six hundred sixty-six thousand, six hundred forty-seven".