219997229 has 2 divisors, whose sum is σ = 219997230. Its totient is φ = 219997228.

The previous prime is 219997213. The next prime is 219997237. The reversal of 219997229 is 922799912.

It is a happy number.

219997229 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., 169260100 + 50737129 = 13010^2 + 7123^2 .

It is a cyclic number.

It is not a de Polignac number, because 219997229 - 2⁴ = 219997213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (219997259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109998614 + 109998615.

It is an arithmetic number, because the mean of its divisors is an integer number (109998615).

Almost surely, 2^219997229 is an apocalyptic number.

It is an amenable number.

219997229 is a deficient number, since it is larger than the sum of its proper divisors (1).

219997229 is an equidigital number, since it uses as much as digits as its factorization.

219997229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 367416, while the sum is 50.

The square root of 219997229 is about 14832.3035635062. The cubic root of 219997229 is about 603.6785391233.

The spelling of 219997229 in words is "two hundred nineteen million, nine hundred ninety-seven thousand, two hundred twenty-nine".