216641701 has 2 divisors, whose sum is σ = 216641702. Its totient is φ = 216641700.

The previous prime is 216641627. The next prime is 216641707. The reversal of 216641701 is 107146612.

216641701 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132020100 + 84621601 = 11490^2 + 9199^2 .

It is a cyclic number.

It is not a de Polignac number, because 216641701 - 2⁷ = 216641573 is a prime.

It is a super-2 number, since 2×216641701² = 93867253224346802, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 216641701.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216641707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108320850 + 108320851.

It is an arithmetic number, because the mean of its divisors is an integer number (108320851).

Almost surely, 2^216641701 is an apocalyptic number.

It is an amenable number.

216641701 is a deficient number, since it is larger than the sum of its proper divisors (1).

216641701 is an equidigital number, since it uses as much as digits as its factorization.

216641701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 216641701 is about 14718.7533779189. The cubic root of 216641701 is about 600.5935801699.

The spelling of 216641701 in words is "two hundred sixteen million, six hundred forty-one thousand, seven hundred one".