217245646040101 has 16 divisors (see below), whose sum is σ = 254344890054528. Its totient is φ = 181662744384000.

The previous prime is 217245646040081. The next prime is 217245646040117. The reversal of 217245646040101 is 101040646542712.

217245646040101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 217245646040101 - 2²⁵ = 217245612485669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217245646040201) 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, 4095975 + ... + 21243076.

It is an arithmetic number, because the mean of its divisors is an integer number (15896555628408).

Almost surely, 2^{217245646040101} is an apocalyptic number.

It is an amenable number.

217245646040101 is a deficient number, since it is larger than the sum of its proper divisors (37099244014427).

217245646040101 is a wasteful number, since it uses less digits than its factorization.

217245646040101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25368972.

The product of its (nonzero) digits is 322560, while the sum is 43.

The spelling of 217245646040101 in words is "two hundred seventeen trillion, two hundred forty-five billion, six hundred forty-six million, forty thousand, one hundred one".