2188082861 has 2 divisors, whose sum is σ = 2188082862. Its totient is φ = 2188082860.

The previous prime is 2188082843. The next prime is 2188082879. The reversal of 2188082861 is 1682808812.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (2188082843) and next prime (2188082879).

It can be written as a sum of positive squares in only one way, i.e., 1246513636 + 941569225 = 35306^2 + 30685^2 .

It is a cyclic number.

It is not a de Polignac number, because 2188082861 - 2¹⁴ = 2188066477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2188082891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1094041430 + 1094041431.

It is an arithmetic number, because the mean of its divisors is an integer number (1094041431).

Almost surely, 2^2188082861 is an apocalyptic number.

It is an amenable number.

2188082861 is a deficient number, since it is larger than the sum of its proper divisors (1).

2188082861 is an equidigital number, since it uses as much as digits as its factorization.

2188082861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 98304, while the sum is 44.

The square root of 2188082861 is about 46776.9479658517. The cubic root of 2188082861 is about 1298.2388105500.

The spelling of 2188082861 in words is "two billion, one hundred eighty-eight million, eighty-two thousand, eight hundred sixty-one".