225665593 has 2 divisors, whose sum is σ = 225665594. Its totient is φ = 225665592.

The previous prime is 225665579. The next prime is 225665611. The reversal of 225665593 is 395566522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 223891369 + 1774224 = 14963^2 + 1332^2 .

It is a cyclic number.

It is not a de Polignac number, because 225665593 - 2⁹ = 225665081 is a prime.

It is not a weakly prime, because it can be changed into another prime (225665543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112832796 + 112832797.

It is an arithmetic number, because the mean of its divisors is an integer number (112832797).

Almost surely, 2^225665593 is an apocalyptic number.

It is an amenable number.

225665593 is a deficient number, since it is larger than the sum of its proper divisors (1).

225665593 is an equidigital number, since it uses as much as digits as its factorization.

225665593 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 486000, while the sum is 43.

The square root of 225665593 is about 15022.1700496300. The cubic root of 225665593 is about 608.8193530043.

The spelling of 225665593 in words is "two hundred twenty-five million, six hundred sixty-five thousand, five hundred ninety-three".