216215089 has 4 divisors (see below), whose sum is σ = 216277360. Its totient is φ = 216152820.

The previous prime is 216215071. The next prime is 216215119. The reversal of 216215089 is 980512612.

216215089 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is not a de Polignac number, because 216215089 - 2⁹ = 216214577 is a prime.

It is a super-2 number, since 2×216215089² = 93497929422555842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216215189) 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, 25599 + ... + 32980.

It is an arithmetic number, because the mean of its divisors is an integer number (54069340).

Almost surely, 2^216215089 is an apocalyptic number.

It is an amenable number.

216215089 is a deficient number, since it is larger than the sum of its proper divisors (62271).

216215089 is an equidigital number, since it uses as much as digits as its factorization.

216215089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62270.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 216215089 is about 14704.2541123309. The cubic root of 216215089 is about 600.1990904125.

The spelling of 216215089 in words is "two hundred sixteen million, two hundred fifteen thousand, eighty-nine".