225651563 has 2 divisors, whose sum is σ = 225651564. Its totient is φ = 225651562.

The previous prime is 225651553. The next prime is 225651593. The reversal of 225651563 is 365156522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 225651563 - 2⁶ = 225651499 is a prime.

It is not a weakly prime, because it can be changed into another prime (225651553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112825781 + 112825782.

It is an arithmetic number, because the mean of its divisors is an integer number (112825782).

Almost surely, 2^225651563 is an apocalyptic number.

225651563 is a deficient number, since it is larger than the sum of its proper divisors (1).

225651563 is an equidigital number, since it uses as much as digits as its factorization.

225651563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54000, while the sum is 35.

The square root of 225651563 is about 15021.7030658977. The cubic root of 225651563 is about 608.8067356436.

The spelling of 225651563 in words is "two hundred twenty-five million, six hundred fifty-one thousand, five hundred sixty-three".