216330969 has 4 divisors (see below), whose sum is σ = 288441296. Its totient is φ = 144220644.

The previous prime is 216330953. The next prime is 216330977. The reversal of 216330969 is 969033612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 216330969 - 2⁴ = 216330953 is a prime.

It is a super-2 number, since 2×216330969² = 93598176296957922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216330469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36055159 + ... + 36055164.

It is an arithmetic number, because the mean of its divisors is an integer number (72110324).

Almost surely, 2^216330969 is an apocalyptic number.

It is an amenable number.

216330969 is a deficient number, since it is larger than the sum of its proper divisors (72110327).

216330969 is an equidigital number, since it uses as much as digits as its factorization.

216330969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72110326.

The product of its (nonzero) digits is 52488, while the sum is 39.

The square root of 216330969 is about 14708.1939407937. The cubic root of 216330969 is about 600.3062963887.

The spelling of 216330969 in words is "two hundred sixteen million, three hundred thirty thousand, nine hundred sixty-nine".