2185359109 has 2 divisors, whose sum is σ = 2185359110. Its totient is φ = 2185359108.

The previous prime is 2185359103. The next prime is 2185359131. The reversal of 2185359109 is 9019535812.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1632968100 + 552391009 = 40410^2 + 23503^2 .

It is a cyclic number.

It is not a de Polignac number, because 2185359109 - 2¹¹ = 2185357061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2185359103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1092679554 + 1092679555.

It is an arithmetic number, because the mean of its divisors is an integer number (1092679555).

Almost surely, 2^2185359109 is an apocalyptic number.

It is an amenable number.

2185359109 is a deficient number, since it is larger than the sum of its proper divisors (1).

2185359109 is an equidigital number, since it uses as much as digits as its factorization.

2185359109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 97200, while the sum is 43.

The square root of 2185359109 is about 46747.8246445757. The cubic root of 2185359109 is about 1297.6998990844.

The spelling of 2185359109 in words is "two billion, one hundred eighty-five million, three hundred fifty-nine thousand, one hundred nine".