216560849 has 4 divisors (see below), whose sum is σ = 216692736. Its totient is φ = 216428964.

The previous prime is 216560837. The next prime is 216560887. The reversal of 216560849 is 948065612.

It is a happy number.

216560849 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 216560849 - 2⁴ = 216560833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216565849) 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, 63449 + ... + 66774.

It is an arithmetic number, because the mean of its divisors is an integer number (54173184).

Almost surely, 2^216560849 is an apocalyptic number.

It is an amenable number.

216560849 is a deficient number, since it is larger than the sum of its proper divisors (131887).

216560849 is a wasteful number, since it uses less digits than its factorization.

216560849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131886.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 216560849 is about 14716.0065574870. The cubic root of 216560849 is about 600.5188558147.

The spelling of 216560849 in words is "two hundred sixteen million, five hundred sixty thousand, eight hundred forty-nine".