229145999 has 2 divisors, whose sum is σ = 229146000. Its totient is φ = 229145998.

The previous prime is 229145993. The next prime is 229146031. The reversal of 229145999 is 999541922.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 229145999 - 2¹⁶ = 229080463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (229145993) 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, 114572999 + 114573000.

It is an arithmetic number, because the mean of its divisors is an integer number (114573000).

Almost surely, 2^229145999 is an apocalyptic number.

229145999 is a deficient number, since it is larger than the sum of its proper divisors (1).

229145999 is an equidigital number, since it uses as much as digits as its factorization.

229145999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 524880, while the sum is 50.

The square root of 229145999 is about 15137.5691245325. The cubic root of 229145999 is about 611.9333080885.

The spelling of 229145999 in words is "two hundred twenty-nine million, one hundred forty-five thousand, nine hundred ninety-nine".