216344519 has 2 divisors, whose sum is σ = 216344520. Its totient is φ = 216344518.

The previous prime is 216344503. The next prime is 216344543. The reversal of 216344519 is 915443612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216344519 - 2⁴ = 216344503 is a prime.

It is a super-2 number, since 2×216344519² = 93609901802682722, which contains 22 as substring.

It is a Sophie Germain 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 (216344549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108172259 + 108172260.

It is an arithmetic number, because the mean of its divisors is an integer number (108172260).

Almost surely, 2^216344519 is an apocalyptic number.

216344519 is a deficient number, since it is larger than the sum of its proper divisors (1).

216344519 is an equidigital number, since it uses as much as digits as its factorization.

216344519 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 35.

The square root of 216344519 is about 14708.6545611759. The cubic root of 216344519 is about 600.3188296235.

The spelling of 216344519 in words is "two hundred sixteen million, three hundred forty-four thousand, five hundred nineteen".