209385213 has 8 divisors (see below), whose sum is σ = 280584000. Its totient is φ = 138888288.

The previous prime is 209385203. The next prime is 209385229. The reversal of 209385213 is 312583902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 209385213 - 2²⁰ = 208336637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209385203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174768 + ... + 175961.

It is an arithmetic number, because the mean of its divisors is an integer number (35073000).

Almost surely, 2^209385213 is an apocalyptic number.

It is an amenable number.

209385213 is a deficient number, since it is larger than the sum of its proper divisors (71198787).

209385213 is a wasteful number, since it uses less digits than its factorization.

209385213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350931.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 209385213 is about 14470.1490317135. The cubic root of 209385213 is about 593.8115892824.

The spelling of 209385213 in words is "two hundred nine million, three hundred eighty-five thousand, two hundred thirteen".