260216209 has 4 divisors (see below), whose sum is σ = 283872240. Its totient is φ = 236560180.

The previous prime is 260216183. The next prime is 260216221. The reversal of 260216209 is 902612062.

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 260216209 - 2⁷ = 260216081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (260216239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11827999 + ... + 11828020.

It is an arithmetic number, because the mean of its divisors is an integer number (70968060).

Almost surely, 2^260216209 is an apocalyptic number.

It is an amenable number.

260216209 is a deficient number, since it is larger than the sum of its proper divisors (23656031).

260216209 is a wasteful number, since it uses less digits than its factorization.

260216209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23656030.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 260216209 is about 16131.2184598684. The cubic root of 260216209 is about 638.4272981600.

The spelling of 260216209 in words is "two hundred sixty million, two hundred sixteen thousand, two hundred nine".