216005459 has 2 divisors, whose sum is σ = 216005460. Its totient is φ = 216005458.

The previous prime is 216005437. The next prime is 216005477. The reversal of 216005459 is 954500612.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216005459 - 2¹⁶ = 215939923 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (216005059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108002729 + 108002730.

It is an arithmetic number, because the mean of its divisors is an integer number (108002730).

Almost surely, 2^216005459 is an apocalyptic number.

216005459 is a deficient number, since it is larger than the sum of its proper divisors (1).

216005459 is an equidigital number, since it uses as much as digits as its factorization.

216005459 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 216005459 is about 14697.1241744771. The cubic root of 216005459 is about 600.0050545870.

The spelling of 216005459 in words is "two hundred sixteen million, five thousand, four hundred fifty-nine".