217606809341 has 2 divisors, whose sum is σ = 217606809342. Its totient is φ = 217606809340.

The previous prime is 217606809317. The next prime is 217606809347. The reversal of 217606809341 is 143908606712.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 185721350116 + 31885459225 = 430954^2 + 178565^2 .

It is a cyclic number.

It is not a de Polignac number, because 217606809341 - 2³⁴ = 200426940157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (217606809347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108803404670 + 108803404671.

It is an arithmetic number, because the mean of its divisors is an integer number (108803404671).

Almost surely, 2^217606809341 is an apocalyptic number.

It is an amenable number.

217606809341 is a deficient number, since it is larger than the sum of its proper divisors (1).

217606809341 is an equidigital number, since it uses as much as digits as its factorization.

217606809341 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 47.

The spelling of 217606809341 in words is "two hundred seventeen billion, six hundred six million, eight hundred nine thousand, three hundred forty-one".