2185513873 has 2 divisors, whose sum is σ = 2185513874. Its totient is φ = 2185513872.

The previous prime is 2185513867. The next prime is 2185513879. The reversal of 2185513873 is 3783155812.

It is a balanced prime because it is at equal distance from previous prime (2185513867) and next prime (2185513879).

It can be written as a sum of positive squares in only one way, i.e., 2183505984 + 2007889 = 46728^2 + 1417^2 .

It is a cyclic number.

It is not a de Polignac number, because 2185513873 - 2¹³ = 2185505681 is a prime.

It is not a weakly prime, because it can be changed into another prime (2185513879) 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 as a sum of consecutive naturals, namely, 1092756936 + 1092756937.

It is an arithmetic number, because the mean of its divisors is an integer number (1092756937).

Almost surely, 2^2185513873 is an apocalyptic number.

It is an amenable number.

2185513873 is a deficient number, since it is larger than the sum of its proper divisors (1).

2185513873 is an equidigital number, since it uses as much as digits as its factorization.

2185513873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 201600, while the sum is 43.

The square root of 2185513873 is about 46749.4799222408. The cubic root of 2185513873 is about 1297.7305321103.

The spelling of 2185513873 in words is "two billion, one hundred eighty-five million, five hundred thirteen thousand, eight hundred seventy-three".