216316601 has 2 divisors, whose sum is σ = 216316602. Its totient is φ = 216316600.

The previous prime is 216316591. The next prime is 216316613. The reversal of 216316601 is 106613612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 204919225 + 11397376 = 14315^2 + 3376^2 .

It is a cyclic number.

It is not a de Polignac number, because 216316601 - 2²² = 212122297 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (216316621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108158300 + 108158301.

It is an arithmetic number, because the mean of its divisors is an integer number (108158301).

Almost surely, 2^216316601 is an apocalyptic number.

It is an amenable number.

216316601 is a deficient number, since it is larger than the sum of its proper divisors (1).

216316601 is an equidigital number, since it uses as much as digits as its factorization.

216316601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 216316601 is about 14707.7054974595. The cubic root of 216316601 is about 600.2930059633.

The spelling of 216316601 in words is "two hundred sixteen million, three hundred sixteen thousand, six hundred one".