229449821 has 2 divisors, whose sum is σ = 229449822. Its totient is φ = 229449820.

The previous prime is 229449811. The next prime is 229449859. The reversal of 229449821 is 128944922.

229449821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116877721 + 112572100 = 10811^2 + 10610^2 .

It is a cyclic number.

It is not a de Polignac number, because 229449821 - 2¹⁰ = 229448797 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (229449811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114724910 + 114724911.

It is an arithmetic number, because the mean of its divisors is an integer number (114724911).

Almost surely, 2^229449821 is an apocalyptic number.

It is an amenable number.

229449821 is a deficient number, since it is larger than the sum of its proper divisors (1).

229449821 is an equidigital number, since it uses as much as digits as its factorization.

229449821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 41.

The square root of 229449821 is about 15147.6011632205. The cubic root of 229449821 is about 612.2036403856.

The spelling of 229449821 in words is "two hundred twenty-nine million, four hundred forty-nine thousand, eight hundred twenty-one".