216860213 has 2 divisors, whose sum is σ = 216860214. Its totient is φ = 216860212.

The previous prime is 216860197. The next prime is 216860233. The reversal of 216860213 is 312068612.

216860213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 179613604 + 37246609 = 13402^2 + 6103^2 .

It is a cyclic number.

It is not a de Polignac number, because 216860213 - 2⁴ = 216860197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216860233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108430106 + 108430107.

It is an arithmetic number, because the mean of its divisors is an integer number (108430107).

Almost surely, 2^216860213 is an apocalyptic number.

It is an amenable number.

216860213 is a deficient number, since it is larger than the sum of its proper divisors (1).

216860213 is an equidigital number, since it uses as much as digits as its factorization.

216860213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 216860213 is about 14726.1744183613. The cubic root of 216860213 is about 600.7954385151.

The spelling of 216860213 in words is "two hundred sixteen million, eight hundred sixty thousand, two hundred thirteen".