219729229 has 2 divisors, whose sum is σ = 219729230. Its totient is φ = 219729228.

The previous prime is 219729227. The next prime is 219729241. The reversal of 219729229 is 922927912.

219729229 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., 219336100 + 393129 = 14810^2 + 627^2 .

It is a cyclic number.

It is not a de Polignac number, because 219729229 - 2¹ = 219729227 is a prime.

Together with 219729227, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (219729221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109864614 + 109864615.

It is an arithmetic number, because the mean of its divisors is an integer number (109864615).

Almost surely, 2^219729229 is an apocalyptic number.

It is an amenable number.

219729229 is a deficient number, since it is larger than the sum of its proper divisors (1).

219729229 is an equidigital number, since it uses as much as digits as its factorization.

219729229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 43.

The square root of 219729229 is about 14823.2664753758. The cubic root of 219729229 is about 603.4333063547.

The spelling of 219729229 in words is "two hundred nineteen million, seven hundred twenty-nine thousand, two hundred twenty-nine".