2186468881 has 2 divisors, whose sum is σ = 2186468882. Its totient is φ = 2186468880.

The previous prime is 2186468863. The next prime is 2186468903. The reversal of 2186468881 is 1888646812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1952225856 + 234243025 = 44184^2 + 15305^2 .

It is a cyclic number.

It is not a de Polignac number, because 2186468881 - 2¹¹ = 2186466833 is a prime.

It is a super-2 number, since 2×2186468881² = 9561292335162784322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2186468831) 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, 1093234440 + 1093234441.

It is an arithmetic number, because the mean of its divisors is an integer number (1093234441).

Almost surely, 2^2186468881 is an apocalyptic number.

It is an amenable number.

2186468881 is a deficient number, since it is larger than the sum of its proper divisors (1).

2186468881 is an equidigital number, since it uses as much as digits as its factorization.

2186468881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1179648, while the sum is 52.

The square root of 2186468881 is about 46759.6929095990. The cubic root of 2186468881 is about 1297.9195284801.

The spelling of 2186468881 in words is "two billion, one hundred eighty-six million, four hundred sixty-eight thousand, eight hundred eighty-one".