2186111149 has 2 divisors, whose sum is σ = 2186111150. Its totient is φ = 2186111148.

The previous prime is 2186111143. The next prime is 2186111189. The reversal of 2186111149 is 9411116812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1740141225 + 445969924 = 41715^2 + 21118^2 .

It is a cyclic number.

It is not a de Polignac number, because 2186111149 - 2¹⁵ = 2186078381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2186111143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1093055574 + 1093055575.

It is an arithmetic number, because the mean of its divisors is an integer number (1093055575).

Almost surely, 2^2186111149 is an apocalyptic number.

It is an amenable number.

2186111149 is a deficient number, since it is larger than the sum of its proper divisors (1).

2186111149 is an equidigital number, since it uses as much as digits as its factorization.

2186111149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 34.

The square root of 2186111149 is about 46755.8675355297. The cubic root of 2186111149 is about 1297.8487396575.

The spelling of 2186111149 in words is "two billion, one hundred eighty-six million, one hundred eleven thousand, one hundred forty-nine".