216360511 has 2 divisors, whose sum is σ = 216360512. Its totient is φ = 216360510.

The previous prime is 216360509. The next prime is 216360533. The reversal of 216360511 is 115063612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216360511 - 2¹ = 216360509 is a prime.

It is a super-2 number, since 2×216360511² = 93623741440362242, which contains 22 as substring.

Together with 216360509, 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 (216360541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108180255 + 108180256.

It is an arithmetic number, because the mean of its divisors is an integer number (108180256).

Almost surely, 2^216360511 is an apocalyptic number.

216360511 is a deficient number, since it is larger than the sum of its proper divisors (1).

216360511 is an equidigital number, since it uses as much as digits as its factorization.

216360511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 216360511 is about 14709.1981766512. The cubic root of 216360511 is about 600.3336209422. Note that the first 3 decimals are identical.

The spelling of 216360511 in words is "two hundred sixteen million, three hundred sixty thousand, five hundred eleven".