2166225647 has 2 divisors, whose sum is σ = 2166225648. Its totient is φ = 2166225646.

The previous prime is 2166225641. The next prime is 2166225653. The reversal of 2166225647 is 7465226612.

It is a balanced prime because it is at equal distance from previous prime (2166225641) and next prime (2166225653).

It is a cyclic number.

It is not a de Polignac number, because 2166225647 - 2¹⁰ = 2166224623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2166225641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1083112823 + 1083112824.

It is an arithmetic number, because the mean of its divisors is an integer number (1083112824).

Almost surely, 2^2166225647 is an apocalyptic number.

2166225647 is a deficient number, since it is larger than the sum of its proper divisors (1).

2166225647 is an equidigital number, since it uses as much as digits as its factorization.

2166225647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 41.

The square root of 2166225647 is about 46542.7292603259. The cubic root of 2166225647 is about 1293.9015440364.

The spelling of 2166225647 in words is "two billion, one hundred sixty-six million, two hundred twenty-five thousand, six hundred forty-seven".