2189041381 has 2 divisors, whose sum is σ = 2189041382. Its totient is φ = 2189041380.

The previous prime is 2189041321. The next prime is 2189041411. The reversal of 2189041381 is 1831409812.

2189041381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1641060100 + 547981281 = 40510^2 + 23409^2 .

It is a cyclic number.

It is not a de Polignac number, because 2189041381 - 2⁹ = 2189040869 is a prime.

It is a super-2 number, since 2×2189041381² = 9583804335460774322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2189041381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2189041301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1094520690 + 1094520691.

It is an arithmetic number, because the mean of its divisors is an integer number (1094520691).

Almost surely, 2^2189041381 is an apocalyptic number.

It is an amenable number.

2189041381 is a deficient number, since it is larger than the sum of its proper divisors (1).

2189041381 is an equidigital number, since it uses as much as digits as its factorization.

2189041381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 2189041381 is about 46787.1924889707. The cubic root of 2189041381 is about 1298.4283533722.

The spelling of 2189041381 in words is "two billion, one hundred eighty-nine million, forty-one thousand, three hundred eighty-one".