224390321 has 2 divisors, whose sum is σ = 224390322. Its totient is φ = 224390320.

The previous prime is 224390281. The next prime is 224390329. The reversal of 224390321 is 123093422.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 168065296 + 56325025 = 12964^2 + 7505^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-224390321 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 (224390329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112195160 + 112195161.

It is an arithmetic number, because the mean of its divisors is an integer number (112195161).

Almost surely, 2^224390321 is an apocalyptic number.

It is an amenable number.

224390321 is a deficient number, since it is larger than the sum of its proper divisors (1).

224390321 is an equidigital number, since it uses as much as digits as its factorization.

224390321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 224390321 is about 14979.6635810021. The cubic root of 224390321 is about 607.6703410056.

The spelling of 224390321 in words is "two hundred twenty-four million, three hundred ninety thousand, three hundred twenty-one".