209230615 has 16 divisors (see below), whose sum is σ = 277994880. Its totient is φ = 149893920.

The previous prime is 209230607. The next prime is 209230643. The reversal of 209230615 is 516032902.

It is not a de Polignac number, because 209230615 - 2³ = 209230607 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24705 + ... + 32074.

It is an arithmetic number, because the mean of its divisors is an integer number (17374680).

Almost surely, 2^209230615 is an apocalyptic number.

209230615 is a deficient number, since it is larger than the sum of its proper divisors (68764265).

209230615 is a wasteful number, since it uses less digits than its factorization.

209230615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56862.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 209230615 is about 14464.8060823504. The cubic root of 209230615 is about 593.6654078563.

The spelling of 209230615 in words is "two hundred nine million, two hundred thirty thousand, six hundred fifteen".