229191606209 has 2 divisors, whose sum is σ = 229191606210. Its totient is φ = 229191606208.

The previous prime is 229191606169. The next prime is 229191606221. The reversal of 229191606209 is 902606191922.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 160558085809 + 68633520400 = 400697^2 + 261980^2 .

It is a cyclic number.

It is not a de Polignac number, because 229191606209 - 2¹² = 229191602113 is a prime.

It is a super-2 number, since 2×229191606209² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (229191606229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114595803104 + 114595803105.

It is an arithmetic number, because the mean of its divisors is an integer number (114595803105).

Almost surely, 2^229191606209 is an apocalyptic number.

It is an amenable number.

229191606209 is a deficient number, since it is larger than the sum of its proper divisors (1).

229191606209 is an equidigital number, since it uses as much as digits as its factorization.

229191606209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 209952, while the sum is 47.

The spelling of 229191606209 in words is "two hundred twenty-nine billion, one hundred ninety-one million, six hundred six thousand, two hundred nine".