225326637197 has 2 divisors, whose sum is σ = 225326637198. Its totient is φ = 225326637196.

The previous prime is 225326637161. The next prime is 225326637223. The reversal of 225326637197 is 791736623522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114018327556 + 111308309641 = 337666^2 + 333629^2 .

It is a cyclic number.

It is not a de Polignac number, because 225326637197 - 2²² = 225322442893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225326637997) 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, 112663318598 + 112663318599.

It is an arithmetic number, because the mean of its divisors is an integer number (112663318599).

Almost surely, 2^225326637197 is an apocalyptic number.

It is an amenable number.

225326637197 is a deficient number, since it is larger than the sum of its proper divisors (1).

225326637197 is an equidigital number, since it uses as much as digits as its factorization.

225326637197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5715360, while the sum is 53.

The spelling of 225326637197 in words is "two hundred twenty-five billion, three hundred twenty-six million, six hundred thirty-seven thousand, one hundred ninety-seven".