216742219 has 2 divisors, whose sum is σ = 216742220. Its totient is φ = 216742218.

The previous prime is 216742217. The next prime is 216742237. The reversal of 216742219 is 912247612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216742219 - 2¹ = 216742217 is a prime.

It is a super-2 number, since 2×216742219² = 93954378994087922, which contains 22 as substring.

Together with 216742217, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (216742213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108371109 + 108371110.

It is an arithmetic number, because the mean of its divisors is an integer number (108371110).

Almost surely, 2^216742219 is an apocalyptic number.

216742219 is a deficient number, since it is larger than the sum of its proper divisors (1).

216742219 is an equidigital number, since it uses as much as digits as its factorization.

216742219 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 34.

The square root of 216742219 is about 14722.1676053494. The cubic root of 216742219 is about 600.6864541498.

The spelling of 216742219 in words is "two hundred sixteen million, seven hundred forty-two thousand, two hundred nineteen".