209217144210 has 16 divisors (see below), whose sum is σ = 502121146176. Its totient is φ = 55791238448.

The previous prime is 209217144193. The next prime is 209217144223. The reversal of 209217144210 is 12441712902.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3486952374 + ... + 3486952433.

It is an arithmetic number, because the mean of its divisors is an integer number (31382571636).

Almost surely, 2^209217144210 is an apocalyptic number.

209217144210 is an abundant number, since it is smaller than the sum of its proper divisors (292904001966).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

209217144210 is a wasteful number, since it uses less digits than its factorization.

209217144210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6973904817.

The product of its (nonzero) digits is 8064, while the sum is 33.

The spelling of 209217144210 in words is "two hundred nine billion, two hundred seventeen million, one hundred forty-four thousand, two hundred ten".