216348811 has 8 divisors (see below), whose sum is σ = 251447040. Its totient is φ = 182298408.

The previous prime is 216348791. The next prime is 216348823. The reversal of 216348811 is 118843612.

216348811 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 216348811 - 2⁹ = 216348299 is a prime.

It is a super-2 number, since 2×216348811² = 93613616042227442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216348211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 261511 + ... + 262336.

It is an arithmetic number, because the mean of its divisors is an integer number (31430880).

Almost surely, 2^216348811 is an apocalyptic number.

216348811 is a deficient number, since it is larger than the sum of its proper divisors (35098229).

216348811 is an equidigital number, since it uses as much as digits as its factorization.

216348811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523913.

The product of its digits is 9216, while the sum is 34.

The square root of 216348811 is about 14708.8004609485. The cubic root of 216348811 is about 600.3227994512.

The spelling of 216348811 in words is "two hundred sixteen million, three hundred forty-eight thousand, eight hundred eleven".