216061213 has 2 divisors, whose sum is σ = 216061214. Its totient is φ = 216061212.

The previous prime is 216061187. The next prime is 216061253. The reversal of 216061213 is 312160612.

216061213 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., 127644804 + 88416409 = 11298^2 + 9403^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216061213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216061253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108030606 + 108030607.

It is an arithmetic number, because the mean of its divisors is an integer number (108030607).

Almost surely, 2^216061213 is an apocalyptic number.

It is an amenable number.

216061213 is a deficient number, since it is larger than the sum of its proper divisors (1).

216061213 is an equidigital number, since it uses as much as digits as its factorization.

216061213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 216061213 is about 14699.0208177280. The cubic root of 216061213 is about 600.0566733504.

The spelling of 216061213 in words is "two hundred sixteen million, sixty-one thousand, two hundred thirteen".