2185087609 has 4 divisors (see below), whose sum is σ = 2300092240. Its totient is φ = 2070082980.

The previous prime is 2185087523. The next prime is 2185087633. The reversal of 2185087609 is 9067805812.

2185087609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2185087609 - 2¹³ = 2185079417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2185087109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57502287 + ... + 57502324.

It is an arithmetic number, because the mean of its divisors is an integer number (575023060).

Almost surely, 2^2185087609 is an apocalyptic number.

It is an amenable number.

2185087609 is a deficient number, since it is larger than the sum of its proper divisors (115004631).

2185087609 is a wasteful number, since it uses less digits than its factorization.

2185087609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115004630.

The product of its (nonzero) digits is 241920, while the sum is 46.

The square root of 2185087609 is about 46744.9206759408. The cubic root of 2185087609 is about 1297.6461565649.

The spelling of 2185087609 in words is "two billion, one hundred eighty-five million, eighty-seven thousand, six hundred nine".