216532559 has 2 divisors, whose sum is σ = 216532560. Its totient is φ = 216532558.

The previous prime is 216532529. The next prime is 216532573. The reversal of 216532559 is 955235612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216532559 - 2¹⁶ = 216467023 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216532529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108266279 + 108266280.

It is an arithmetic number, because the mean of its divisors is an integer number (108266280).

Almost surely, 2^216532559 is an apocalyptic number.

216532559 is a deficient number, since it is larger than the sum of its proper divisors (1).

216532559 is an equidigital number, since it uses as much as digits as its factorization.

216532559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81000, while the sum is 38.

The square root of 216532559 is about 14715.0453278269. The cubic root of 216532559 is about 600.4927054766.

The spelling of 216532559 in words is "two hundred sixteen million, five hundred thirty-two thousand, five hundred fifty-nine".