216532663 has 2 divisors, whose sum is σ = 216532664. Its totient is φ = 216532662.

The previous prime is 216532661. The next prime is 216532681. The reversal of 216532663 is 366235612.

216532663 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 is a cyclic number.

It is not a de Polignac number, because 216532663 - 2¹ = 216532661 is a prime.

Together with 216532661, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216532661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108266331 + 108266332.

It is an arithmetic number, because the mean of its divisors is an integer number (108266332).

Almost surely, 2^216532663 is an apocalyptic number.

216532663 is a deficient number, since it is larger than the sum of its proper divisors (1).

216532663 is an equidigital number, since it uses as much as digits as its factorization.

216532663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 34.

The square root of 216532663 is about 14715.0488616246. The cubic root of 216532663 is about 600.4928016149.

The spelling of 216532663 in words is "two hundred sixteen million, five hundred thirty-two thousand, six hundred sixty-three".