219555229 has 2 divisors, whose sum is σ = 219555230. Its totient is φ = 219555228.

The previous prime is 219555227. The next prime is 219555233. The reversal of 219555229 is 922555912.

219555229 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., 154430329 + 65124900 = 12427^2 + 8070^2 .

It is a cyclic number.

It is not a de Polignac number, because 219555229 - 2¹ = 219555227 is a prime.

Together with 219555227, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 219555191 and 219555200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (219555223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109777614 + 109777615.

It is an arithmetic number, because the mean of its divisors is an integer number (109777615).

Almost surely, 2^219555229 is an apocalyptic number.

It is an amenable number.

219555229 is a deficient number, since it is larger than the sum of its proper divisors (1).

219555229 is an equidigital number, since it uses as much as digits as its factorization.

219555229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81000, while the sum is 40.

The square root of 219555229 is about 14817.3961612694. The cubic root of 219555229 is about 603.2739812871.

The spelling of 219555229 in words is "two hundred nineteen million, five hundred fifty-five thousand, two hundred twenty-nine".