229704521 has 2 divisors, whose sum is σ = 229704522. Its totient is φ = 229704520.

The previous prime is 229704499. The next prime is 229704533. The reversal of 229704521 is 125407922.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125440000 + 104264521 = 11200^2 + 10211^2 .

It is a cyclic number.

It is not a de Polignac number, because 229704521 - 2¹⁰ = 229703497 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (229704421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114852260 + 114852261.

It is an arithmetic number, because the mean of its divisors is an integer number (114852261).

Almost surely, 2^229704521 is an apocalyptic number.

It is an amenable number.

229704521 is a deficient number, since it is larger than the sum of its proper divisors (1).

229704521 is an equidigital number, since it uses as much as digits as its factorization.

229704521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 229704521 is about 15156.0061031922. The cubic root of 229704521 is about 612.4300814816.

The spelling of 229704521 in words is "two hundred twenty-nine million, seven hundred four thousand, five hundred twenty-one".