229569521 has 2 divisors, whose sum is σ = 229569522. Its totient is φ = 229569520.

The previous prime is 229569503. The next prime is 229569551. The reversal of 229569521 is 125965922.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 155351296 + 74218225 = 12464^2 + 8615^2 .

It is a cyclic number.

It is not a de Polignac number, because 229569521 - 2²² = 225375217 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (229569551) 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, 114784760 + 114784761.

It is an arithmetic number, because the mean of its divisors is an integer number (114784761).

Almost surely, 2^229569521 is an apocalyptic number.

It is an amenable number.

229569521 is a deficient number, since it is larger than the sum of its proper divisors (1).

229569521 is an equidigital number, since it uses as much as digits as its factorization.

229569521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 97200, while the sum is 41.

The square root of 229569521 is about 15151.5517687133. The cubic root of 229569521 is about 612.3100805592.

The spelling of 229569521 in words is "two hundred twenty-nine million, five hundred sixty-nine thousand, five hundred twenty-one".