229222891 has 2 divisors, whose sum is σ = 229222892. Its totient is φ = 229222890.

The previous prime is 229222871. The next prime is 229222907. The reversal of 229222891 is 198222922.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 229222891 - 2²¹ = 227125739 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 229222891.

It is not a weakly prime, because it can be changed into another prime (229222831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114611445 + 114611446.

It is an arithmetic number, because the mean of its divisors is an integer number (114611446).

Almost surely, 2^229222891 is an apocalyptic number.

229222891 is a deficient number, since it is larger than the sum of its proper divisors (1).

229222891 is an equidigital number, since it uses as much as digits as its factorization.

229222891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 37.

The square root of 229222891 is about 15140.1086852109. The cubic root of 229222891 is about 612.0017470083.

The spelling of 229222891 in words is "two hundred twenty-nine million, two hundred twenty-two thousand, eight hundred ninety-one".