216204893 has 2 divisors, whose sum is σ = 216204894. Its totient is φ = 216204892.

The previous prime is 216204839. The next prime is 216204953. The reversal of 216204893 is 398402612.

216204893 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (216204839) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145274809 + 70930084 = 12053^2 + 8422^2 .

It is a cyclic number.

It is not a de Polignac number, because 216204893 - 2⁶ = 216204829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216204803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108102446 + 108102447.

It is an arithmetic number, because the mean of its divisors is an integer number (108102447).

Almost surely, 2^216204893 is an apocalyptic number.

It is an amenable number.

216204893 is a deficient number, since it is larger than the sum of its proper divisors (1).

216204893 is an equidigital number, since it uses as much as digits as its factorization.

216204893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 216204893 is about 14703.9074058564. The cubic root of 216204893 is about 600.1896557856.

The spelling of 216204893 in words is "two hundred sixteen million, two hundred four thousand, eight hundred ninety-three".