217252250705 has 16 divisors (see below), whose sum is σ = 302142369024. Its totient is φ = 146874759360.

The previous prime is 217252250641. The next prime is 217252250707. The reversal of 217252250705 is 507052252712.

It is a happy number.

It is not a de Polignac number, because 217252250705 - 2⁶ = 217252250641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (217252250707) 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 in 15 ways as a sum of consecutive naturals, for example, 43710242 + ... + 43715211.

It is an arithmetic number, because the mean of its divisors is an integer number (18883898064).

Almost surely, 2^217252250705 is an apocalyptic number.

It is an amenable number.

217252250705 is a deficient number, since it is larger than the sum of its proper divisors (84890118319).

217252250705 is an equidigital number, since it uses as much as digits as its factorization.

217252250705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87425536.

The product of its (nonzero) digits is 98000, while the sum is 38.

The spelling of 217252250705 in words is "two hundred seventeen billion, two hundred fifty-two million, two hundred fifty thousand, seven hundred five".