2185044813 has 12 divisors (see below), whose sum is σ = 3607058208. Its totient is φ = 1248597000.

The previous prime is 2185044811. The next prime is 2185044877. The reversal of 2185044813 is 3184405812.

It is not a de Polignac number, because 2185044813 - 2¹ = 2185044811 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2185044811) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17341563 + ... + 17341688.

It is an arithmetic number, because the mean of its divisors is an integer number (300588184).

Almost surely, 2^2185044813 is an apocalyptic number.

It is an amenable number.

2185044813 is a deficient number, since it is larger than the sum of its proper divisors (1422013395).

2185044813 is a wasteful number, since it uses less digits than its factorization.

2185044813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34683264 (or 34683261 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 2185044813 is about 46744.4629127344. The cubic root of 2185044813 is about 1297.6376848332.

The spelling of 2185044813 in words is "two billion, one hundred eighty-five million, forty-four thousand, eight hundred thirteen".