225197897 has 2 divisors, whose sum is σ = 225197898. Its totient is φ = 225197896.

The previous prime is 225197851. The next prime is 225197911. The reversal of 225197897 is 798791522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 217739536 + 7458361 = 14756^2 + 2731^2 .

It is a cyclic number.

It is not a de Polignac number, because 225197897 - 2¹⁴ = 225181513 is a prime.

It is not a weakly prime, because it can be changed into another prime (225097897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112598948 + 112598949.

It is an arithmetic number, because the mean of its divisors is an integer number (112598949).

Almost surely, 2^225197897 is an apocalyptic number.

It is an amenable number.

225197897 is a deficient number, since it is larger than the sum of its proper divisors (1).

225197897 is an equidigital number, since it uses as much as digits as its factorization.

225197897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 635040, while the sum is 50.

The square root of 225197897 is about 15006.5951168145. The cubic root of 225197897 is about 608.3984657520.

The spelling of 225197897 in words is "two hundred twenty-five million, one hundred ninety-seven thousand, eight hundred ninety-seven".