210342009 has 8 divisors (see below), whose sum is σ = 280531360. Its totient is φ = 140190336.

The previous prime is 210342007. The next prime is 210342023. The reversal of 210342009 is 900243012.

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

It is not a de Polignac number, because 210342009 - 2¹ = 210342007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210342007) 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, 8457 + ... + 22185.

It is an arithmetic number, because the mean of its divisors is an integer number (35066420).

Almost surely, 2^210342009 is an apocalyptic number.

It is an amenable number.

210342009 is a deficient number, since it is larger than the sum of its proper divisors (70189351).

210342009 is a wasteful number, since it uses less digits than its factorization.

210342009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18839.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 210342009 is about 14503.1723771043. The cubic root of 210342009 is about 594.7146988019.

The spelling of 210342009 in words is "two hundred ten million, three hundred forty-two thousand, nine".