209710000355 has 4 divisors (see below), whose sum is σ = 251652000432. Its totient is φ = 167768000280.

The previous prime is 209710000349. The next prime is 209710000397. The reversal of 209710000355 is 553000017902.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 209710000355 - 2²⁰ = 209708951779 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20971000031 + ... + 20971000040.

It is an arithmetic number, because the mean of its divisors is an integer number (62913000108).

Almost surely, 2^209710000355 is an apocalyptic number.

209710000355 is a deficient number, since it is larger than the sum of its proper divisors (41942000077).

209710000355 is an equidigital number, since it uses as much as digits as its factorization.

209710000355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41942000076.

The product of its (nonzero) digits is 9450, while the sum is 32.

The spelling of 209710000355 in words is "two hundred nine billion, seven hundred ten million, three hundred fifty-five", and thus it is an aban number.