225783197 has 2 divisors, whose sum is σ = 225783198. Its totient is φ = 225783196.

The previous prime is 225783193. The next prime is 225783209. The reversal of 225783197 is 791387522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126202756 + 99580441 = 11234^2 + 9979^2 .

It is a cyclic number.

It is not a de Polignac number, because 225783197 - 2² = 225783193 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225783191) 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, 112891598 + 112891599.

It is an arithmetic number, because the mean of its divisors is an integer number (112891599).

Almost surely, 2^225783197 is an apocalyptic number.

It is an amenable number.

225783197 is a deficient number, since it is larger than the sum of its proper divisors (1).

225783197 is an equidigital number, since it uses as much as digits as its factorization.

225783197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 211680, while the sum is 44.

The square root of 225783197 is about 15026.0838876934. The cubic root of 225783197 is about 608.9250952459.

The spelling of 225783197 in words is "two hundred twenty-five million, seven hundred eighty-three thousand, one hundred ninety-seven".