216560723 has 2 divisors, whose sum is σ = 216560724. Its totient is φ = 216560722.

The previous prime is 216560713. The next prime is 216560731. The reversal of 216560723 is 327065612.

216560723 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216560723 - 2²² = 212366419 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216560723.

It is not a weakly prime, because it can be changed into another prime (216560713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108280361 + 108280362.

It is an arithmetic number, because the mean of its divisors is an integer number (108280362).

Almost surely, 2^216560723 is an apocalyptic number.

216560723 is a deficient number, since it is larger than the sum of its proper divisors (1).

216560723 is an equidigital number, since it uses as much as digits as its factorization.

216560723 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 216560723 is about 14716.0022764336. The cubic root of 216560723 is about 600.5187393495.

The spelling of 216560723 in words is "two hundred sixteen million, five hundred sixty thousand, seven hundred twenty-three".