216710233 has 2 divisors, whose sum is σ = 216710234. Its totient is φ = 216710232.

The previous prime is 216710231. The next prime is 216710251. The reversal of 216710233 is 332017612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 216442944 + 267289 = 14712^2 + 517^2 .

It is a cyclic number.

It is not a de Polignac number, because 216710233 - 2¹ = 216710231 is a prime.

Together with 216710231, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 216710198 and 216710207.

It is not a weakly prime, because it can be changed into another prime (216710231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108355116 + 108355117.

It is an arithmetic number, because the mean of its divisors is an integer number (108355117).

Almost surely, 2^216710233 is an apocalyptic number.

It is an amenable number.

216710233 is a deficient number, since it is larger than the sum of its proper divisors (1).

216710233 is an equidigital number, since it uses as much as digits as its factorization.

216710233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 216710233 is about 14721.0812442565. The cubic root of 216710233 is about 600.6569036816.

Adding to 216710233 its reverse (332017612), we get a palindrome (548727845).

The spelling of 216710233 in words is "two hundred sixteen million, seven hundred ten thousand, two hundred thirty-three".