2085915209 has 8 divisors (see below), whose sum is σ = 2509371840. Its totient is φ = 1693825776.

The previous prime is 2085915203. The next prime is 2085915211. The reversal of 2085915209 is 9025195802.

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

It is a cyclic number.

It is not a de Polignac number, because 2085915209 - 2⁴ = 2085915193 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2085915203) 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, 7841654 + ... + 7841919.

It is an arithmetic number, because the mean of its divisors is an integer number (313671480).

Almost surely, 2^2085915209 is an apocalyptic number.

It is an amenable number.

2085915209 is a deficient number, since it is larger than the sum of its proper divisors (423456631).

2085915209 is a wasteful number, since it uses less digits than its factorization.

2085915209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15683599.

The product of its (nonzero) digits is 64800, while the sum is 41.

The square root of 2085915209 is about 45671.8207322633. The cubic root of 2085915209 is about 1277.7097736996.

The spelling of 2085915209 in words is "two billion, eighty-five million, nine hundred fifteen thousand, two hundred nine".