229440287 has 2 divisors, whose sum is σ = 229440288. Its totient is φ = 229440286.

The previous prime is 229440259. The next prime is 229440317. The reversal of 229440287 is 782044922.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 229440287 - 2¹⁰ = 229439263 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 229440287.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (229440587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114720143 + 114720144.

It is an arithmetic number, because the mean of its divisors is an integer number (114720144).

Almost surely, 2^229440287 is an apocalyptic number.

229440287 is a deficient number, since it is larger than the sum of its proper divisors (1).

229440287 is an equidigital number, since it uses as much as digits as its factorization.

229440287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 229440287 is about 15147.2864566562. The cubic root of 229440287 is about 612.1951609276.

The spelling of 229440287 in words is "two hundred twenty-nine million, four hundred forty thousand, two hundred eighty-seven".