229205819 has 2 divisors, whose sum is σ = 229205820. Its totient is φ = 229205818.

The previous prime is 229205807. The next prime is 229205839. The reversal of 229205819 is 918502922.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 229205819 - 2⁴ = 229205803 is a prime.

It is a super-2 number, since 2×229205819² = 105070614926921522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (229205839) 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, 114602909 + 114602910.

It is an arithmetic number, because the mean of its divisors is an integer number (114602910).

Almost surely, 2^229205819 is an apocalyptic number.

229205819 is a deficient number, since it is larger than the sum of its proper divisors (1).

229205819 is an equidigital number, since it uses as much as digits as its factorization.

229205819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 229205819 is about 15139.5448742688. The cubic root of 229205819 is about 611.9865531313.

The spelling of 229205819 in words is "two hundred twenty-nine million, two hundred five thousand, eight hundred nineteen".