217221570672213 has 16 divisors (see below), whose sum is σ = 299682823723200. Its totient is φ = 139789577840640.

The previous prime is 217221570672193. The next prime is 217221570672257. The reversal of 217221570672213 is 312276075122712.

It is not a de Polignac number, because 217221570672213 - 2⁵ = 217221570672181 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217221570672013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 278208643 + ... + 278988336.

It is an arithmetic number, because the mean of its divisors is an integer number (18730176482700).

Almost surely, 2^{217221570672213} is an apocalyptic number.

It is an amenable number.

217221570672213 is a deficient number, since it is larger than the sum of its proper divisors (82461253050987).

217221570672213 is a wasteful number, since it uses less digits than its factorization.

217221570672213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557201492.

The product of its (nonzero) digits is 987840, while the sum is 48.

The spelling of 217221570672213 in words is "two hundred seventeen trillion, two hundred twenty-one billion, five hundred seventy million, six hundred seventy-two thousand, two hundred thirteen".