2186318551 has 2 divisors, whose sum is σ = 2186318552. Its totient is φ = 2186318550.

The previous prime is 2186318513. The next prime is 2186318557. The reversal of 2186318551 is 1558136812.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2186318551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2186318557) 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, 1093159275 + 1093159276.

It is an arithmetic number, because the mean of its divisors is an integer number (1093159276).

Almost surely, 2^2186318551 is an apocalyptic number.

2186318551 is a deficient number, since it is larger than the sum of its proper divisors (1).

2186318551 is an equidigital number, since it uses as much as digits as its factorization.

2186318551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 57600, while the sum is 40.

The square root of 2186318551 is about 46758.0854077666. The cubic root of 2186318551 is about 1297.8897817781.

The spelling of 2186318551 in words is "two billion, one hundred eighty-six million, three hundred eighteen thousand, five hundred fifty-one".