225022009 has 2 divisors, whose sum is σ = 225022010. Its totient is φ = 225022008.

The previous prime is 225022003. The next prime is 225022027. The reversal of 225022009 is 900220522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 205635600 + 19386409 = 14340^2 + 4403^2 .

It is a cyclic number.

It is not a de Polignac number, because 225022009 - 2²³ = 216633401 is a prime.

It is equal to p_12384031 and since 225022009 and 12384031 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (225022003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112511004 + 112511005.

It is an arithmetic number, because the mean of its divisors is an integer number (112511005).

Almost surely, 2^225022009 is an apocalyptic number.

It is an amenable number.

225022009 is a deficient number, since it is larger than the sum of its proper divisors (1).

225022009 is an equidigital number, since it uses as much as digits as its factorization.

225022009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 225022009 is about 15000.7336153936. The cubic root of 225022009 is about 608.2400304935.

The spelling of 225022009 in words is "two hundred twenty-five million, twenty-two thousand, nine".