216216593 has 2 divisors, whose sum is σ = 216216594. Its totient is φ = 216216592.

The previous prime is 216216569. The next prime is 216216607. The reversal of 216216593 is 395612612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164044864 + 52171729 = 12808^2 + 7223^2 .

It is a cyclic number.

It is not a de Polignac number, because 216216593 - 2⁸ = 216216337 is a prime.

It is not a weakly prime, because it can be changed into another prime (216216503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108108296 + 108108297.

It is an arithmetic number, because the mean of its divisors is an integer number (108108297).

Almost surely, 2^216216593 is an apocalyptic number.

It is an amenable number.

216216593 is a deficient number, since it is larger than the sum of its proper divisors (1).

216216593 is an equidigital number, since it uses as much as digits as its factorization.

216216593 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 35.

The square root of 216216593 is about 14704.3052539044. The cubic root of 216216593 is about 600.2004820782.

The spelling of 216216593 in words is "two hundred sixteen million, two hundred sixteen thousand, five hundred ninety-three".