216011089 has 4 divisors (see below), whose sum is σ = 246869824. Its totient is φ = 185152356.

The previous prime is 216011071. The next prime is 216011113. The reversal of 216011089 is 980110612.

It is a happy number.

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 216011089 - 2⁷ = 216010961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216015089) 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, 15429357 + ... + 15429370.

It is an arithmetic number, because the mean of its divisors is an integer number (61717456).

Almost surely, 2^216011089 is an apocalyptic number.

It is an amenable number.

216011089 is a deficient number, since it is larger than the sum of its proper divisors (30858735).

216011089 is an equidigital number, since it uses as much as digits as its factorization.

216011089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30858734.

The product of its (nonzero) digits is 864, while the sum is 28.

The square root of 216011089 is about 14697.3157072984. The cubic root of 216011089 is about 600.0102674169.

The spelling of 216011089 in words is "two hundred sixteen million, eleven thousand, eighty-nine".