225136536409 has 2 divisors, whose sum is σ = 225136536410. Its totient is φ = 225136536408.

The previous prime is 225136536379. The next prime is 225136536413. The reversal of 225136536409 is 904635631522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 149051589184 + 76084947225 = 386072^2 + 275835^2 .

It is a cyclic number.

It is not a de Polignac number, because 225136536409 - 2⁷ = 225136536281 is a prime.

It is not a weakly prime, because it can be changed into another prime (225136533409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112568268204 + 112568268205.

It is an arithmetic number, because the mean of its divisors is an integer number (112568268205).

Almost surely, 2^225136536409 is an apocalyptic number.

It is an amenable number.

225136536409 is a deficient number, since it is larger than the sum of its proper divisors (1).

225136536409 is an equidigital number, since it uses as much as digits as its factorization.

225136536409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1166400, while the sum is 46.

The spelling of 225136536409 in words is "two hundred twenty-five billion, one hundred thirty-six million, five hundred thirty-six thousand, four hundred nine".