225831197 has 2 divisors, whose sum is σ = 225831198. Its totient is φ = 225831196.

The previous prime is 225831167. The next prime is 225831299. The reversal of 225831197 is 791138522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 149548441 + 76282756 = 12229^2 + 8734^2 .

It is a cyclic number.

It is not a de Polignac number, because 225831197 - 2¹⁸ = 225569053 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 225831197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225831107) 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, 112915598 + 112915599.

It is an arithmetic number, because the mean of its divisors is an integer number (112915599).

Almost surely, 2^225831197 is an apocalyptic number.

It is an amenable number.

225831197 is a deficient number, since it is larger than the sum of its proper divisors (1).

225831197 is an equidigital number, since it uses as much as digits as its factorization.

225831197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 38.

The square root of 225831197 is about 15027.6810253612. The cubic root of 225831197 is about 608.9682433247.

The spelling of 225831197 in words is "two hundred twenty-five million, eight hundred thirty-one thousand, one hundred ninety-seven".