225775321 has 2 divisors, whose sum is σ = 225775322. Its totient is φ = 225775320.

The previous prime is 225775273. The next prime is 225775331. The reversal of 225775321 is 123577522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144865296 + 80910025 = 12036^2 + 8995^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225775321 is a prime.

It is not a weakly prime, because it can be changed into another prime (225775331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112887660 + 112887661.

It is an arithmetic number, because the mean of its divisors is an integer number (112887661).

Almost surely, 2^225775321 is an apocalyptic number.

It is an amenable number.

225775321 is a deficient number, since it is larger than the sum of its proper divisors (1).

225775321 is an equidigital number, since it uses as much as digits as its factorization.

225775321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29400, while the sum is 34.

The square root of 225775321 is about 15025.8218078081. The cubic root of 225775321 is about 608.9180147812.

The spelling of 225775321 in words is "two hundred twenty-five million, seven hundred seventy-five thousand, three hundred twenty-one".