209868219 has 32 divisors (see below), whose sum is σ = 340538880. Its totient is φ = 126684000.

The previous prime is 209868209. The next prime is 209868227. The reversal of 209868219 is 912868902.

209868219 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 209868219 - 2¹¹ = 209866171 is a prime.

It is a super-2 number, since 2×209868219² = 88089338692463922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (209868209) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 80994 + ... + 83544.

It is an arithmetic number, because the mean of its divisors is an integer number (10641840).

Almost surely, 2^209868219 is an apocalyptic number.

209868219 is a deficient number, since it is larger than the sum of its proper divisors (130670661).

209868219 is a wasteful number, since it uses less digits than its factorization.

209868219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2848 (or 2842 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 209868219 is about 14486.8291561680. The cubic root of 209868219 is about 594.2678365647.

The spelling of 209868219 in words is "two hundred nine million, eight hundred sixty-eight thousand, two hundred nineteen".