2211681389 has 2 divisors, whose sum is σ = 2211681390. Its totient is φ = 2211681388.

The previous prime is 2211681349. The next prime is 2211681463. The reversal of 2211681389 is 9831861122.

2211681389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1650796900 + 560884489 = 40630^2 + 23683^2 .

It is a cyclic number.

It is not a de Polignac number, because 2211681389 - 2²⁸ = 1943245933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2211681349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1105840694 + 1105840695.

It is an arithmetic number, because the mean of its divisors is an integer number (1105840695).

Almost surely, 2^2211681389 is an apocalyptic number.

It is an amenable number.

2211681389 is a deficient number, since it is larger than the sum of its proper divisors (1).

2211681389 is an equidigital number, since it uses as much as digits as its factorization.

2211681389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 41.

The square root of 2211681389 is about 47028.5167637679. The cubic root of 2211681389 is about 1302.8893110882.

The spelling of 2211681389 in words is "two billion, two hundred eleven million, six hundred eighty-one thousand, three hundred eighty-nine".