2181346229 has 2 divisors, whose sum is σ = 2181346230. Its totient is φ = 2181346228.

The previous prime is 2181346207. The next prime is 2181346241. The reversal of 2181346229 is 9226431812.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1355933329 + 825412900 = 36823^2 + 28730^2 .

It is a cyclic number.

It is not a de Polignac number, because 2181346229 - 2²⁰ = 2180297653 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2181346192 and 2181346201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2181349229) 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, 1090673114 + 1090673115.

It is an arithmetic number, because the mean of its divisors is an integer number (1090673115).

Almost surely, 2^2181346229 is an apocalyptic number.

It is an amenable number.

2181346229 is a deficient number, since it is larger than the sum of its proper divisors (1).

2181346229 is an equidigital number, since it uses as much as digits as its factorization.

2181346229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 38.

The square root of 2181346229 is about 46704.8844233663. The cubic root of 2181346229 is about 1296.9051090887.

The spelling of 2181346229 in words is "two billion, one hundred eighty-one million, three hundred forty-six thousand, two hundred twenty-nine".