2186377321 has 2 divisors, whose sum is σ = 2186377322. Its totient is φ = 2186377320.

The previous prime is 2186377313. The next prime is 2186377351. The reversal of 2186377321 is 1237736812.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2139987600 + 46389721 = 46260^2 + 6811^2 .

It is a cyclic number.

It is not a de Polignac number, because 2186377321 - 2³ = 2186377313 is a prime.

It is not a weakly prime, because it can be changed into another prime (2186377301) 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, 1093188660 + 1093188661.

It is an arithmetic number, because the mean of its divisors is an integer number (1093188661).

Almost surely, 2^2186377321 is an apocalyptic number.

It is an amenable number.

2186377321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2186377321 is an equidigital number, since it uses as much as digits as its factorization.

2186377321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672, while the sum is 40.

The square root of 2186377321 is about 46758.7138510032. The cubic root of 2186377321 is about 1297.9014111141.

The spelling of 2186377321 in words is "two billion, one hundred eighty-six million, three hundred seventy-seven thousand, three hundred twenty-one".