225409643 has 2 divisors, whose sum is σ = 225409644. Its totient is φ = 225409642.

The previous prime is 225409631. The next prime is 225409651. The reversal of 225409643 is 346904522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 225409643 - 2⁴ = 225409627 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (225409693) 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, 112704821 + 112704822.

It is an arithmetic number, because the mean of its divisors is an integer number (112704822).

Almost surely, 2^225409643 is an apocalyptic number.

225409643 is a deficient number, since it is larger than the sum of its proper divisors (1).

225409643 is an equidigital number, since it uses as much as digits as its factorization.

225409643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 225409643 is about 15013.6485572295. The cubic root of 225409643 is about 608.5890915488.

The spelling of 225409643 in words is "two hundred twenty-five million, four hundred nine thousand, six hundred forty-three".