229165971809 has 2 divisors, whose sum is σ = 229165971810. Its totient is φ = 229165971808.

The previous prime is 229165971799. The next prime is 229165971821. The reversal of 229165971809 is 908179561922.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 173010243025 + 56155728784 = 415945^2 + 236972^2 .

It is a cyclic number.

It is not a de Polignac number, because 229165971809 - 2⁸ = 229165971553 is a prime.

It is not a weakly prime, because it can be changed into another prime (229165971829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114582985904 + 114582985905.

It is an arithmetic number, because the mean of its divisors is an integer number (114582985905).

Almost surely, 2^229165971809 is an apocalyptic number.

It is an amenable number.

229165971809 is a deficient number, since it is larger than the sum of its proper divisors (1).

229165971809 is an equidigital number, since it uses as much as digits as its factorization.

229165971809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4898880, while the sum is 59.

The spelling of 229165971809 in words is "two hundred twenty-nine billion, one hundred sixty-five million, nine hundred seventy-one thousand, eight hundred nine".