2185397617 has 16 divisors (see below), whose sum is σ = 2498549760. Its totient is φ = 1893595392.

The previous prime is 2185397603. The next prime is 2185397629. The reversal of 2185397617 is 7167935812.

It is a happy number.

It is not a de Polignac number, because 2185397617 - 2³¹ = 37913969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2185397717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71734 + ... + 97552.

It is an arithmetic number, because the mean of its divisors is an integer number (156159360).

Almost surely, 2^2185397617 is an apocalyptic number.

It is an amenable number.

2185397617 is a deficient number, since it is larger than the sum of its proper divisors (313152143).

2185397617 is a wasteful number, since it uses less digits than its factorization.

2185397617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26232.

The product of its digits is 635040, while the sum is 49.

The square root of 2185397617 is about 46748.2365121937. The cubic root of 2185397617 is about 1297.7075212542.

The spelling of 2185397617 in words is "two billion, one hundred eighty-five million, three hundred ninety-seven thousand, six hundred seventeen".