225117197 has 2 divisors, whose sum is σ = 225117198. Its totient is φ = 225117196.

The previous prime is 225117173. The next prime is 225117229. The reversal of 225117197 is 791711522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 160250281 + 64866916 = 12659^2 + 8054^2 .

It is a cyclic number.

It is not a de Polignac number, because 225117197 - 2¹⁸ = 224855053 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225117107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112558598 + 112558599.

It is an arithmetic number, because the mean of its divisors is an integer number (112558599).

Almost surely, 2^225117197 is an apocalyptic number.

It is an amenable number.

225117197 is a deficient number, since it is larger than the sum of its proper divisors (1).

225117197 is an equidigital number, since it uses as much as digits as its factorization.

225117197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8820, while the sum is 35.

The square root of 225117197 is about 15003.9060580903. The cubic root of 225117197 is about 608.3257835722.

The spelling of 225117197 in words is "two hundred twenty-five million, one hundred seventeen thousand, one hundred ninety-seven".