2185120837 has 2 divisors, whose sum is σ = 2185120838. Its totient is φ = 2185120836.

The previous prime is 2185120829. The next prime is 2185120867. The reversal of 2185120837 is 7380215812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1417221316 + 767899521 = 37646^2 + 27711^2 .

It is a cyclic number.

It is not a de Polignac number, because 2185120837 - 2³ = 2185120829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2185120796 and 2185120805.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2185120807) 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, 1092560418 + 1092560419.

It is an arithmetic number, because the mean of its divisors is an integer number (1092560419).

Almost surely, 2^2185120837 is an apocalyptic number.

It is an amenable number.

2185120837 is a deficient number, since it is larger than the sum of its proper divisors (1).

2185120837 is an equidigital number, since it uses as much as digits as its factorization.

2185120837 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 2185120837 is about 46745.2760928845. The cubic root of 2185120837 is about 1297.6527341757.

The spelling of 2185120837 in words is "two billion, one hundred eighty-five million, one hundred twenty thousand, eight hundred thirty-seven".