225122172409 has 2 divisors, whose sum is σ = 225122172410. Its totient is φ = 225122172408.

The previous prime is 225122172389. The next prime is 225122172439. The reversal of 225122172409 is 904271221522.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130860892009 + 94261280400 = 361747^2 + 307020^2 .

It is a cyclic number.

It is not a de Polignac number, because 225122172409 - 2⁷ = 225122172281 is a prime.

It is not a weakly prime, because it can be changed into another prime (225122172439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112561086204 + 112561086205.

It is an arithmetic number, because the mean of its divisors is an integer number (112561086205).

Almost surely, 2^225122172409 is an apocalyptic number.

It is an amenable number.

225122172409 is a deficient number, since it is larger than the sum of its proper divisors (1).

225122172409 is an equidigital number, since it uses as much as digits as its factorization.

225122172409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 37.

The spelling of 225122172409 in words is "two hundred twenty-five billion, one hundred twenty-two million, one hundred seventy-two thousand, four hundred nine".